18x+21=10x+90

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Solution for 18x+21=10x+90 equation:


Simplifying
18x + 21 = 10x + 90

Reorder the terms:
21 + 18x = 10x + 90

Reorder the terms:
21 + 18x = 90 + 10x

Solving
21 + 18x = 90 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
21 + 18x + -10x = 90 + 10x + -10x

Combine like terms: 18x + -10x = 8x
21 + 8x = 90 + 10x + -10x

Combine like terms: 10x + -10x = 0
21 + 8x = 90 + 0
21 + 8x = 90

Add '-21' to each side of the equation.
21 + -21 + 8x = 90 + -21

Combine like terms: 21 + -21 = 0
0 + 8x = 90 + -21
8x = 90 + -21

Combine like terms: 90 + -21 = 69
8x = 69

Divide each side by '8'.
x = 8.625

Simplifying
x = 8.625

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