Question

3x(x+2)-96=0 0.3乘7加4x=12.5 （x+3）除5=1.6

Answer 1

3x(x+2)-96=0

3(x+2)=96

x+2=32

x=30

0.3×7+4x=12.5

2.1+4x=12.5

4x=12.5-2.1

4x=10.4

x=2.6

(x+3)÷5=1.6

x+3=1.6×5

x+3=8

x=5