Question

20 POINTS!!! NEED ALL 4 ANSWERED!!!

Set the two sides equal to each other and solve for x!

① -2x + 81 = 61

② 9x - 58 = 5

③ 21 + 10x = 3x + 28

④ 9x - 42 = 2x

(I already put them in the correct forms based on each images But here's the images anyways, just in case.)

Answer 1

1. x = 10 2. x = 7 3. x = 1 4. x = 6

Step-by-step explanation:

1. -2x + 81 = 61 (Subtract 81 from 61)

-2x = -20 (Divide)

x = 10

2. 9x - 58 = 5 (Add 58 to 5)

9x = 63 (Divide)

x = 7

3. 21 +10x = 3x + 28 (Rearrange expression)

21 - 28 = 3x - 10x (Combine like terms)

-7 = -7x (Divide)

x = 1

4. 9x - 42 = 2x (Rearrange)

9x - 2x = 42 (Combine like terms)

7x = 42 (Divide)

x = 6