Question

Solve and check the following equations. Show your solution.

9.) 12 - 3x = 22 + 2x
10.) x + 7x - 12 = -20
11.) 7x + 4 - 13x = -1 + 23​

Answer 1

9. -2

10. -1

11. -3

Explanation:

9. 12-3X=22+2X

Collect like terms

12-22=2X+3X

-10=5X

Divide both side by 5

X= -10/5 = -2

10. X+7X-12= -20

Collect like terms

X+7X = -20+12

8X= -8

Divide both side by 8

X= -8/8 = -1

11. 7X+4-13X= -1+23

Collect like terms

-7X-13X = -1+23-4

-6X = 18

Divide both side by -6

X= 18/-6 = -3