Question

If you can do all 4 even better unless you can do one need ASAP

Answer 1

7). x =8

8). x = 5

9). x= -7

10). x= 11

Explanation:

7). 7x + 4 = 8x - 4

move and collect like terms

7x - 8x = -4 - 4

-x = -8

change the sign

x = 8

8). 22x - 4 = 20x + 6

collect like terms and combine

2x = 10

x =5

9). x + 97 = 90

x = 90 -97

x= -7

10). 7x + 13 = 90

7x = 90 - 13

7x = 77

x = 11