90+90+x+3x=720

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Solution for 90+90+x+3x=720 equation:


Simplifying
90 + 90 + x + 3x = 720

Combine like terms: 90 + 90 = 180
180 + x + 3x = 720

Combine like terms: x + 3x = 4x
180 + 4x = 720

Solving
180 + 4x = 720

Solving for variable 'x'.

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

Add '-180' to each side of the equation.
180 + -180 + 4x = 720 + -180

Combine like terms: 180 + -180 = 0
0 + 4x = 720 + -180
4x = 720 + -180

Combine like terms: 720 + -180 = 540
4x = 540

Divide each side by '4'.
x = 135

Simplifying
x = 135

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