Question

解方程：5x-2=3.6；7（x-1.2）=2.1；7.5×8-4x=20；9.6x-2.4x=21.6；4x-7×1.

Answer 1

5x=3.6+2

5x=5.6

X=1.12

x-1.2=2.1/7

x-1.2=0.3

x=1.2+0.3

X=1.5

60-4x=20

4x=40

x=40/10

X=10

7.2x=21.6

x=21.6/7.2

X=3

4x=9.9+9.1

4x=19

x=19/4

X=4.75