Answer:
The answer to your question is x = 10
Step-by-step explanation:
Use proportions to solve this problem
Given (x + 4)/8 = (2x + 1)/12
12(x + 4) = 8(2x + 1)
Expand
12x + 48 = 16x + 8
Group like terms
12x - 16x = - 48 + 8
Simplify
-4x = -40
Solve for x
x = -40/-4
Result
x = 10
