7x+8x-40=100-5x

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Solution for 7x+8x-40=100-5x equation:


Simplifying
7x + 8x + -40 = 100 + -5x

Reorder the terms:
-40 + 7x + 8x = 100 + -5x

Combine like terms: 7x + 8x = 15x
-40 + 15x = 100 + -5x

Solving
-40 + 15x = 100 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
-40 + 15x + 5x = 100 + -5x + 5x

Combine like terms: 15x + 5x = 20x
-40 + 20x = 100 + -5x + 5x

Combine like terms: -5x + 5x = 0
-40 + 20x = 100 + 0
-40 + 20x = 100

Add '40' to each side of the equation.
-40 + 40 + 20x = 100 + 40

Combine like terms: -40 + 40 = 0
0 + 20x = 100 + 40
20x = 100 + 40

Combine like terms: 100 + 40 = 140
20x = 140

Divide each side by '20'.
x = 7

Simplifying
x = 7

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