x+x+21+4x-30=813

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Solution for x+x+21+4x-30=813 equation:


Simplifying
x + x + 21 + 4x + -30 = 813

Reorder the terms:
21 + -30 + x + x + 4x = 813

Combine like terms: 21 + -30 = -9
-9 + x + x + 4x = 813

Combine like terms: x + x = 2x
-9 + 2x + 4x = 813

Combine like terms: 2x + 4x = 6x
-9 + 6x = 813

Solving
-9 + 6x = 813

Solving for variable 'x'.

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

Add '9' to each side of the equation.
-9 + 9 + 6x = 813 + 9

Combine like terms: -9 + 9 = 0
0 + 6x = 813 + 9
6x = 813 + 9

Combine like terms: 813 + 9 = 822
6x = 822

Divide each side by '6'.
x = 137

Simplifying
x = 137

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