7x+9x-20=100-4x

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Solution for 7x+9x-20=100-4x equation:


Simplifying
7x + 9x + -20 = 100 + -4x

Reorder the terms:
-20 + 7x + 9x = 100 + -4x

Combine like terms: 7x + 9x = 16x
-20 + 16x = 100 + -4x

Solving
-20 + 16x = 100 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
-20 + 16x + 4x = 100 + -4x + 4x

Combine like terms: 16x + 4x = 20x
-20 + 20x = 100 + -4x + 4x

Combine like terms: -4x + 4x = 0
-20 + 20x = 100 + 0
-20 + 20x = 100

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

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

Combine like terms: 100 + 20 = 120
20x = 120

Divide each side by '20'.
x = 6

Simplifying
x = 6

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