Question

1)10x + 9 = 7x
2)2x + 2 = - 3
3)x + 7 = 0
4)1 - 5x = - 6x + 8
5)10 (x -9) = 7

Answer 1

10x+9=7x
10x-7x=-9
3x=-9:3
x=-3
2x+2=-3
2x=-3-2
2x=-5:2
x=-2,5
x+7=0
x=0-7
x=-7
1-5x=-6x+8
-5x+6x=8-1
x=7
10(x-9)=7
10x-90=7
10x=7+90
10x=97:10
x=9,7