21x-5=7+18x

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Solution for 21x-5=7+18x equation:


Simplifying
21x + -5 = 7 + 18x

Reorder the terms:
-5 + 21x = 7 + 18x

Solving
-5 + 21x = 7 + 18x

Solving for variable 'x'.

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

Add '-18x' to each side of the equation.
-5 + 21x + -18x = 7 + 18x + -18x

Combine like terms: 21x + -18x = 3x
-5 + 3x = 7 + 18x + -18x

Combine like terms: 18x + -18x = 0
-5 + 3x = 7 + 0
-5 + 3x = 7

Add '5' to each side of the equation.
-5 + 5 + 3x = 7 + 5

Combine like terms: -5 + 5 = 0
0 + 3x = 7 + 5
3x = 7 + 5

Combine like terms: 7 + 5 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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