18x+21=20x-25

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Solution for 18x+21=20x-25 equation:


Simplifying
18x + 21 = 20x + -25

Reorder the terms:
21 + 18x = 20x + -25

Reorder the terms:
21 + 18x = -25 + 20x

Solving
21 + 18x = -25 + 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 + 18x + -20x = -25 + 20x + -20x

Combine like terms: 18x + -20x = -2x
21 + -2x = -25 + 20x + -20x

Combine like terms: 20x + -20x = 0
21 + -2x = -25 + 0
21 + -2x = -25

Add '-21' to each side of the equation.
21 + -21 + -2x = -25 + -21

Combine like terms: 21 + -21 = 0
0 + -2x = -25 + -21
-2x = -25 + -21

Combine like terms: -25 + -21 = -46
-2x = -46

Divide each side by '-2'.
x = 23

Simplifying
x = 23

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