Question

解方程：①6x/3=2.7 ②4（3-x）/6=1.8 ③9（x+3）/2=18 ④2（5-x）+2-6=10x

Answer 1

①

6x/3=2.7

6x=8.1

x = 1.35

②

4(3-x)/6=1.8

4(3-x)=10.8

12 - 4x =10.8

4x = 1.2

x = 0.3

检验：

4（3-0.3）/6

=(12 - 1.2) /6

=10.8 /6

=1.8

③

9(x+3)/2=18

9(x+3) = 36

9x + 27 = 36

9x = 9

x = 1

④

2(5-x)+2-6=10x

10 - 2x - 4 = 10x

12x = 6

x = 1/2