Question

Pls help i really need help

Answer 1

Explanation:

19)

21x+6= 90

21x= 84

x= 4

20)

11x-2= 75

11x= 77

x= 7

21)

8x-4= 60

8x= 64

x= 8

22)

x+139= 132

x= -7

23)

12x+17= -1+14x

12x-14x= -1-17

-2x= -18

x= 9

24)

23x-5= 21x+5

23x-21x= 5+5

2x= 10

x= 5