Question

0.7x-1.71=4.59 1.4x-x=37.2 （x+5）÷7=1.5

Answer 1

0.7x-1.71=4.59

0.7x=4.59+1.71

0.7x=6.3

x=6.3÷0.7

x=9

1.4x-x=37.2

0.4x=37.2

x=37.2÷0.4

x=93

（x+5）÷7=1.5

x+5=1.5×7

x+5=10.5

x=10.5-5

x=5.5