15-5x-4=21

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Solution for 15-5x-4=21 equation:


Simplifying
15 + -5x + -4 = 21

Reorder the terms:
15 + -4 + -5x = 21

Combine like terms: 15 + -4 = 11
11 + -5x = 21

Solving
11 + -5x = 21

Solving for variable 'x'.

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

Add '-11' to each side of the equation.
11 + -11 + -5x = 21 + -11

Combine like terms: 11 + -11 = 0
0 + -5x = 21 + -11
-5x = 21 + -11

Combine like terms: 21 + -11 = 10
-5x = 10

Divide each side by '-5'.
x = -2

Simplifying
x = -2

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