First, we convert the mixed numbers to improper fractions:
121=21×2+1=23 231=32×3+1=37 Now we can rewrite the expression as:
23+37×43−21 Next, we perform the multiplication:
37×43=3×47×3=1221=47 So the expression becomes:
23+47−21 Now, we find a common denominator, which is 4:
23=2×23×2=46 21=2×21×2=42 The expression becomes:
46+47−42 Now we perform the addition and subtraction from left to right:
46+47=46+7=413 413−42=413−2=411 Finally, we convert the improper fraction 411 to a mixed number: 411=243