6x-7=4x-21

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Solution for 6x-7=4x-21 equation:


Simplifying
6x + -7 = 4x + -21

Reorder the terms:
-7 + 6x = 4x + -21

Reorder the terms:
-7 + 6x = -21 + 4x

Solving
-7 + 6x = -21 + 4x

Solving for variable 'x'.

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

Add '-4x' to each side of the equation.
-7 + 6x + -4x = -21 + 4x + -4x

Combine like terms: 6x + -4x = 2x
-7 + 2x = -21 + 4x + -4x

Combine like terms: 4x + -4x = 0
-7 + 2x = -21 + 0
-7 + 2x = -21

Add '7' to each side of the equation.
-7 + 7 + 2x = -21 + 7

Combine like terms: -7 + 7 = 0
0 + 2x = -21 + 7
2x = -21 + 7

Combine like terms: -21 + 7 = -14
2x = -14

Divide each side by '2'.
x = -7

Simplifying
x = -7

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