How do i solve 12+4x=30+12

Question

Mathematics

Valentina Pittman

15 October, 11:37

How do i solve 12+4x=30+12

+1

Answers (1)

Know the Answer?

Madelyn Rodriguez · Answer 1

x = 15/2

Step-by-step explanation:

Solve for x:

4 x + 12 = 42

Subtract 12 from both sides:

4 x + (12 - 12) = 42 - 12

12 - 12 = 0:

4 x = 42 - 12

42 - 12 = 30:

4 x = 30

Divide both sides of 4 x = 30 by 4:

(4 x) / 4 = 30/4

4/4 = 1:

x = 30/4

The gcd of 30 and 4 is 2, so 30/4 = (2*15) / (2*2) = 2/2*15/2 = 15/2:

Answer: x = 15/2