Question

решить уравнения ( подробно)
2x-3*(x-2)=2x-9
5x-0.4*(x-0.5)=0.6x+8.2
6x-1.2*(5-2x)=4.4x+2

Answer 1

2x-3*(x-2)=2x-9

2x-3x+6=2x-9

2x-3x-2x=-9-6

-3x=-15

x=-15/(-3)

x=5

5x-0.4*(x-0.5)=0.6x+8.2

5x-0.4x+0.2=0.6x+8.2

5x-0.4x-0.6x=8.2-0.2

4x=8

x=8/4

x=2

6x-1.2*(5-2x)=4.4x+2

6x-6+2.4x=4.4x+2

6x+2.4x-4.4x=2+6

4x=8

x=8/4

x=2