Question

解下列方程:1.18X-1.9X=19.38 2.16+5.2X=156.4 3.3(x+2)=8.7 4.12×5+4

Answer 1

18X-1.9X=19.38

16.1x=19.38

x=19.38/16.1=1.2

2.

16+5.2X=156.4

5.2x=156.4-16=140.4

x=40.4/5.2=27

3

3(x+2)=8.7

x+2=8.7/3=2.9

x=2.9-2=0.9

4

12×5+4X=78.4

4x=78.4-60=18.4

x=18.4/4=4.6

5.

0.6/X=5

5x=0.6

x=0.6/5=0.12