Question

(x-1/4)÷9=8 (x-20.9)÷3=7.3

Answer 1

(x-1/4)÷9=8

两边乘9

x-1/4=8×9

x-1/4=72

x=72+1/4

x=72又1/4

(x-20.9)÷3=7.3

两边乘3

x-20.9=7.3×3

x-20.9=21.9

x=21.9+20.9

x=42.8