Question

3x+8=-1; 8x+16=20;2x+30=x-2;15-x=16

Answer 1

3x + 8 = -1
3x = -1 -8
3x = -9
x = -9/3
x = -3

8x + 16 = 20
8x = 20 -16
8x = 4
x = 4/8
x = 0,5

2x + 30 = x -2
2x - x = -2 -30
x = -32

15 - x = 16
-x = 16 -15
-x = 1   .(-1)
x = -1

Answer 2

3x+8=-1;
3x=-8
x=-8/3
x=-2,66

8x+16=20;
8x=20-16
8x=4
x=4/8
x=0,5

2x+30=x-2;
2x-x=-2-30
x=-32

15-x=16
-x=16-15
-x=1.(-1)
x=-1

espero q eu tenha te ajudado