8x+21x-12+10x+9+90=360

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Solution for 8x+21x-12+10x+9+90=360 equation:


Simplifying
8x + 21x + -12 + 10x + 9 + 90 = 360

Reorder the terms:
-12 + 9 + 90 + 8x + 21x + 10x = 360

Combine like terms: -12 + 9 = -3
-3 + 90 + 8x + 21x + 10x = 360

Combine like terms: -3 + 90 = 87
87 + 8x + 21x + 10x = 360

Combine like terms: 8x + 21x = 29x
87 + 29x + 10x = 360

Combine like terms: 29x + 10x = 39x
87 + 39x = 360

Solving
87 + 39x = 360

Solving for variable 'x'.

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

Add '-87' to each side of the equation.
87 + -87 + 39x = 360 + -87

Combine like terms: 87 + -87 = 0
0 + 39x = 360 + -87
39x = 360 + -87

Combine like terms: 360 + -87 = 273
39x = 273

Divide each side by '39'.
x = 7

Simplifying
x = 7

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