9(x-1)-15=7(x-1)+20

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Solution for 9(x-1)-15=7(x-1)+20 equation:


Simplifying
9(x + -1) + -15 = 7(x + -1) + 20

Reorder the terms:
9(-1 + x) + -15 = 7(x + -1) + 20
(-1 * 9 + x * 9) + -15 = 7(x + -1) + 20
(-9 + 9x) + -15 = 7(x + -1) + 20

Reorder the terms:
-9 + -15 + 9x = 7(x + -1) + 20

Combine like terms: -9 + -15 = -24
-24 + 9x = 7(x + -1) + 20

Reorder the terms:
-24 + 9x = 7(-1 + x) + 20
-24 + 9x = (-1 * 7 + x * 7) + 20
-24 + 9x = (-7 + 7x) + 20

Reorder the terms:
-24 + 9x = -7 + 20 + 7x

Combine like terms: -7 + 20 = 13
-24 + 9x = 13 + 7x

Solving
-24 + 9x = 13 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
-24 + 9x + -7x = 13 + 7x + -7x

Combine like terms: 9x + -7x = 2x
-24 + 2x = 13 + 7x + -7x

Combine like terms: 7x + -7x = 0
-24 + 2x = 13 + 0
-24 + 2x = 13

Add '24' to each side of the equation.
-24 + 24 + 2x = 13 + 24

Combine like terms: -24 + 24 = 0
0 + 2x = 13 + 24
2x = 13 + 24

Combine like terms: 13 + 24 = 37
2x = 37

Divide each side by '2'.
x = 18.5

Simplifying
x = 18.5

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