Question

Find x if 5^2x+7=125​

Answer 1

Answer:

x =9

Step-by-step explanation:

Simplifying

5(2x + 7) = 125

Reorder the terms:

5(7 + 2x) = 125

(7 * 5 + 2x * 5) = 125

(35 + 10x) = 125

Solving

35 + 10x = 125

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-35' to each side of the equation.

35 + -35 + 10x = 125 + -35

Combine like terms: 35 + -35 = 0

0 + 10x = 125 + -35

10x = 125 + -35

Combine like terms: 125 + -35 = 90

10x = 90

Divide each side by '10'.

x = 9

Simplifying

x = 9

Answer 2

Answer:

Step-by-step explanation:

5^2x+7 = 125

5^2x+7 = 5^3

2x+7 = 3

2x = 3 - 7

2x = -4

x = - 2