Answer:
x = 7
Step-by-step explanation:
8 + 4 = 2 (x − 1)
Simplify both sides of the equation
8 + 4 = 2(x − 1)
8 + 4 = (2)(x) + (2)(−1) (Distribute)
8 + 4 = 2x + −2
(8 + 4) = 2x − 2 (Combine Like Terms)
12 = 2x − 2
12 = 2x − 2
Flip the equation
2x − 2 = 12
Add 2 to both sides
2x − 2 + 2 = 12 + 2
2x = 14
Divide both sides by 2
2x / 2 = 14 / 2
x = 7