21x-18=7(3x+6)-5

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Solution for 21x-18=7(3x+6)-5 equation:


Simplifying
21x + -18 = 7(3x + 6) + -5

Reorder the terms:
-18 + 21x = 7(3x + 6) + -5

Reorder the terms:
-18 + 21x = 7(6 + 3x) + -5
-18 + 21x = (6 * 7 + 3x * 7) + -5
-18 + 21x = (42 + 21x) + -5

Reorder the terms:
-18 + 21x = 42 + -5 + 21x

Combine like terms: 42 + -5 = 37
-18 + 21x = 37 + 21x

Add '-21x' to each side of the equation.
-18 + 21x + -21x = 37 + 21x + -21x

Combine like terms: 21x + -21x = 0
-18 + 0 = 37 + 21x + -21x
-18 = 37 + 21x + -21x

Combine like terms: 21x + -21x = 0
-18 = 37 + 0
-18 = 37

Solving
-18 = 37

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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