-100-21*15=x

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Solution for -100-21*15=x equation:


Simplifying
-100 + -21 * 15 = x

Multiply -21 * 15
-100 + -315 = x

Combine like terms: -100 + -315 = -415
-415 = x

Solving
-415 = 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.
-415 + -1x = x + -1x

Combine like terms: x + -1x = 0
-415 + -1x = 0

Add '415' to each side of the equation.
-415 + 415 + -1x = 0 + 415

Combine like terms: -415 + 415 = 0
0 + -1x = 0 + 415
-1x = 0 + 415

Combine like terms: 0 + 415 = 415
-1x = 415

Divide each side by '-1'.
x = -415

Simplifying
x = -415

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