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

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


Simplifying
6x + -1(5x + 7) = 3x + -21

Reorder the terms:
6x + -1(7 + 5x) = 3x + -21
6x + (7 * -1 + 5x * -1) = 3x + -21
6x + (-7 + -5x) = 3x + -21

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

Combine like terms: 6x + -5x = 1x
-7 + 1x = 3x + -21

Reorder the terms:
-7 + 1x = -21 + 3x

Solving
-7 + 1x = -21 + 3x

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
-7 + 1x + -3x = -21 + 3x + -3x

Combine like terms: 1x + -3x = -2x
-7 + -2x = -21 + 3x + -3x

Combine like terms: 3x + -3x = 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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