We are given a system of two linear equations in two variables, $x$ and $y$, and we need to find the values of $x$ and $y$ that satisfy both equations. The system of equations is: $3x - 5y = 4$ $-2x + 6y = 18$

AlgebraSystem of Linear EquationsElimination MethodTwo Variables
2025/3/11

1. Problem Description

We are given a system of two linear equations in two variables, xx and yy, and we need to find the values of xx and yy that satisfy both equations. The system of equations is:
3x5y=43x - 5y = 4
2x+6y=18-2x + 6y = 18

2. Solution Steps

We can solve this system of equations using either substitution or elimination. Here, we'll use elimination.
First, we multiply the first equation by 2 and the second equation by 3 to eliminate xx.
Multiplying the first equation by 2, we get:
2(3x5y)=2(4)2(3x - 5y) = 2(4)
6x10y=86x - 10y = 8
Multiplying the second equation by 3, we get:
3(2x+6y)=3(18)3(-2x + 6y) = 3(18)
6x+18y=54-6x + 18y = 54
Now, we add the two equations to eliminate xx:
(6x10y)+(6x+18y)=8+54(6x - 10y) + (-6x + 18y) = 8 + 54
8y=628y = 62
y=628=314y = \frac{62}{8} = \frac{31}{4}
Now that we have the value of yy, we can substitute it into one of the original equations to find the value of xx. Let's use the first equation:
3x5y=43x - 5y = 4
3x5(314)=43x - 5(\frac{31}{4}) = 4
3x1554=43x - \frac{155}{4} = 4
3x=4+1554=164+1554=17143x = 4 + \frac{155}{4} = \frac{16}{4} + \frac{155}{4} = \frac{171}{4}
x=1714÷3=171413=17112=574x = \frac{171}{4} \div 3 = \frac{171}{4} \cdot \frac{1}{3} = \frac{171}{12} = \frac{57}{4}
So, x=574x = \frac{57}{4} and y=314y = \frac{31}{4}.

3. Final Answer

x=574,y=314x = \frac{57}{4}, y = \frac{31}{4}

Related problems in "Algebra"

We are given three sub-problems. a) Express $(\frac{13}{15} - \frac{7}{10})$ as a percentage. b) Fac...

FractionsPercentageFactorizationRatioLinear Equations
2025/4/29

Given that $a^2 = 9 + 4\sqrt{5}$, we need to: (a) Show that $a = \sqrt{5} + 2$. (b) Find the value o...

Algebraic ManipulationRadicalsExponentsBinomial TheoremSimplification
2025/4/29

The problem states that the mean of the numbers 2, 5, 2x, and 7 is less than or equal to 5. We need ...

InequalitiesMeanSolving Inequalities
2025/4/29

The problem asks us to find the value of $k$ such that $x^2 + kx + \frac{16}{9}$ is a perfect square...

Quadratic EquationsPerfect Square TrinomialsCompleting the Square
2025/4/29

The problem states that the sum of the roots of the equation $(x - p)(2x + 1) = 0$ is 1. We need to ...

Quadratic EquationsRoots of EquationsSolving Equations
2025/4/29

The problem provides a table of $x$ and $y$ values that satisfy the linear relation $y = mx + c$. We...

Linear EquationsSlope-Intercept FormSolving Equations
2025/4/29

The problem provides a table of $x$ and $y$ values that satisfy a linear equation of the form $y = m...

Linear EquationsSlope-intercept formCoordinate Geometry
2025/4/29

The problem states that the mean age of $R$ men in a club is 50 years. Two men, aged 55 and 63, leav...

Word ProblemAveragesEquationsMeanAge Problem
2025/4/29

The problem asks to find the inequality whose solution is represented by the shaded region in the gi...

Linear InequalitiesGraphing InequalitiesCoordinate Geometry
2025/4/29

The problem asks to find the formula for the $n$th term of the sequence $-2, 4, -8, 16, \dots$. The ...

SequencesSeriesExponents
2025/4/29