3*15+9*15=x

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Solution for 3*15+9*15=x equation:


Simplifying
3 * 15 + 9 * 15 = x

Multiply 3 * 15
45 + 9 * 15 = x

Multiply 9 * 15
45 + 135 = x

Combine like terms: 45 + 135 = 180
180 = x

Solving
180 = x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
180 + -1x = x + -1x

Combine like terms: x + -1x = 0
180 + -1x = 0

Add '-180' to each side of the equation.
180 + -180 + -1x = 0 + -180

Combine like terms: 180 + -180 = 0
0 + -1x = 0 + -180
-1x = 0 + -180

Combine like terms: 0 + -180 = -180
-1x = -180

Divide each side by '-1'.
x = 180

Simplifying
x = 180

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