Question

If 4x + 3 = 15, what is 8x?

Answer 1

all work is pictured and shown

Answer 2

8x = 24

Explanation:

Solve for x:

4 x + 3 = 15

Subtract 3 from both sides:

4 x + (3 - 3) = 15 - 3

3 - 3 = 0:

4 x = 15 - 3

15 - 3 = 12:

4 x = 12

Divide both sides of 4 x = 12 by 4:

(4 x)/4 = 12/4

4/4 = 1:

x = 12/4

The gcd of 12 and 4 is 4, so 12/4 = (4×3)/(4×1) = 4/4×3 = 3:

Answer: x = 3 now multiply 8x = 8*3 = 24