4x+9x-40=100-7x

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Solution for 4x+9x-40=100-7x equation:


Simplifying
4x + 9x + -40 = 100 + -7x

Reorder the terms:
-40 + 4x + 9x = 100 + -7x

Combine like terms: 4x + 9x = 13x
-40 + 13x = 100 + -7x

Solving
-40 + 13x = 100 + -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.
-40 + 13x + 7x = 100 + -7x + 7x

Combine like terms: 13x + 7x = 20x
-40 + 20x = 100 + -7x + 7x

Combine like terms: -7x + 7x = 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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