Question

四道解方程要过程（详见下方第一道9（x-4）-4x=27 ÷ 第二道8.9X+1.1x=20第三道0.6÷5x=0.03

Answer 1

9（x-4）-4x=27

9x-36-4x=27

5x-36=27

5x=63

x=63/5

8.9X+1.1x=20

10x=20

x=2

0.6÷5x=0.03

5x=0.6÷0.03

5x=20

x=4

（x+1.7）÷3=1.4

x+1.7=1.4*3

x+1.7=4.2

x=4.2-1.7

x=2.5