-9x-21=20x-87

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Solution for -9x-21=20x-87 equation:


Simplifying
-9x + -21 = 20x + -87

Reorder the terms:
-21 + -9x = 20x + -87

Reorder the terms:
-21 + -9x = -87 + 20x

Solving
-21 + -9x = -87 + 20x

Solving for variable 'x'.

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

Add '-20x' to each side of the equation.
-21 + -9x + -20x = -87 + 20x + -20x

Combine like terms: -9x + -20x = -29x
-21 + -29x = -87 + 20x + -20x

Combine like terms: 20x + -20x = 0
-21 + -29x = -87 + 0
-21 + -29x = -87

Add '21' to each side of the equation.
-21 + 21 + -29x = -87 + 21

Combine like terms: -21 + 21 = 0
0 + -29x = -87 + 21
-29x = -87 + 21

Combine like terms: -87 + 21 = -66
-29x = -66

Divide each side by '-29'.
x = 2.275862069

Simplifying
x = 2.275862069

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