Question

Which of these equations has the solution x = 5?

A. x + 7 = 3(x - 1)
B. 12 - x = x + 4
C. 2(x + 1) = 3(x - 8)
D. 2(x - 4) = 7x - 1

Answer 1

Answer is A
3(x-1)=3x-3
X+7=3x-3
-x both sides
+3 both sides
10=2x
Divide by 2
X=5

Answer 2

The answer is A
X+7 = 3(x-1)
X+7 = 3x-3
-x on both sides
+3 on both sides
10 = 2x
Divide by 2
X=5