240-6*(x+20)=90

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Solution for 240-6*(x+20)=90 equation:


Simplifying
240 + -6(x + 20) = 90

Reorder the terms:
240 + -6(20 + x) = 90
240 + (20 * -6 + x * -6) = 90
240 + (-120 + -6x) = 90

Combine like terms: 240 + -120 = 120
120 + -6x = 90

Solving
120 + -6x = 90

Solving for variable 'x'.

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

Add '-120' to each side of the equation.
120 + -120 + -6x = 90 + -120

Combine like terms: 120 + -120 = 0
0 + -6x = 90 + -120
-6x = 90 + -120

Combine like terms: 90 + -120 = -30
-6x = -30

Divide each side by '-6'.
x = 5

Simplifying
x = 5

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