20x-(-7x)+3x=90

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Solution for 20x-(-7x)+3x=90 equation: 


Simplifying
20x + -1(-7x) + 3x = 90

Remove parenthesis around (-7x)
20x + -1 * -7x + 3x = 90

Multiply -1 * -7
20x + 7x + 3x = 90

Combine like terms: 20x + 7x = 27x
27x + 3x = 90

Combine like terms: 27x + 3x = 30x
30x = 90

Solving
30x = 90

Solving for variable 'x'.

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

Divide each side by '30'.
x = 3

Simplifying
x = 3

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