The problem is to solve the equation $3(x - 7) = 4 - 2(x + 2)$ for $x$.

AlgebraLinear EquationsEquation SolvingVariable Isolation
2025/3/17

1. Problem Description

The problem is to solve the equation 3(x7)=42(x+2)3(x - 7) = 4 - 2(x + 2) for xx.

2. Solution Steps

First, we distribute the terms in the equation:
3x21=42x43x - 21 = 4 - 2x - 4
Next, we simplify the right side of the equation:
3x21=2x3x - 21 = -2x
Now, we add 2x2x to both sides of the equation:
3x+2x21=2x+2x3x + 2x - 21 = -2x + 2x
5x21=05x - 21 = 0
Next, we add 21 to both sides of the equation:
5x21+21=0+215x - 21 + 21 = 0 + 21
5x=215x = 21
Finally, we divide both sides by 5 to solve for xx:
5x5=215\frac{5x}{5} = \frac{21}{5}
x=215x = \frac{21}{5}

3. Final Answer

x=215x = \frac{21}{5}

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