Question

13x-11=15×+21


3×+2×+4=29


9×+21=8×+36​

Answer 1

1)

13x-11=15x+21

13x-15x=21+11

-2x=32

x=32/-2

x=-16

2)

3x+2x+4=29

5x+4=29

5x=29-4

5x=25

x=25/5

x=5

3)

9x+21=8x+36

9x-8x=36-21

1x=15

x=15/1

x=15