Question

Hi! i need help checking these problems!!

1) 12x + 9 = -15 i know the answer i just need help checking!
2) x/7 - 4 = 4 same with this i need help checking it!

Answer 1

Part 1: x = -2

Part 2: x = 56

Explanation:

Part 1:

12x + 9 = -15

Given that-

12x + 9 = -15

12x + 9 - 9 = -15 -9 >> Subtract 9 to both sides

12x = -24

12x/12 = -24/12 >> Divide both sides by 12

x = -2

Check Answer:

12(-2) + 9 = -15 >> 12 × -2 = -24

-24 + 9 = -15 >> -24 + 9 = -15

-15 = -15 >> Correct

Part 2:

x/7 - 4 = 4

Given that-

x/7 - 4 = 4

x/7 - 4 + 4 = 4 + 4 >> Add 4 to both sides

x/7 = 8

7x/7 = 8 × 7 >> Multiply both sides by 7

x = 56

Check Answer-

Substitute x in the equation the check.

56/7 - 4 = 4 >> 56/7 = 8

8 - 4 = 4 >> 8 - 4 = 4

4 = 4 >> Correct

RevyBreeze