7x-70=21x

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Solution for 7x-70=21x equation:


Simplifying
7x + -70 = 21x

Reorder the terms:
-70 + 7x = 21x

Solving
-70 + 7x = 21x

Solving for variable 'x'.

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

Add '-21x' to each side of the equation.
-70 + 7x + -21x = 21x + -21x

Combine like terms: 7x + -21x = -14x
-70 + -14x = 21x + -21x

Combine like terms: 21x + -21x = 0
-70 + -14x = 0

Add '70' to each side of the equation.
-70 + 70 + -14x = 0 + 70

Combine like terms: -70 + 70 = 0
0 + -14x = 0 + 70
-14x = 0 + 70

Combine like terms: 0 + 70 = 70
-14x = 70

Divide each side by '-14'.
x = -5

Simplifying
x = -5

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