90+45=300-x

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Solution for 90+45=300-x equation:


Simplifying
90 + 45 = 300 + -1x

Combine like terms: 90 + 45 = 135
135 = 300 + -1x

Solving
135 = 300 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
135 + x = 300 + -1x + x

Combine like terms: -1x + x = 0
135 + x = 300 + 0
135 + x = 300

Add '-135' to each side of the equation.
135 + -135 + x = 300 + -135

Combine like terms: 135 + -135 = 0
0 + x = 300 + -135
x = 300 + -135

Combine like terms: 300 + -135 = 165
x = 165

Simplifying
x = 165

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