7x-3(4+2x)=9+x-21

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Solution for 7x-3(4+2x)=9+x-21 equation:


Simplifying
7x + -3(4 + 2x) = 9 + x + -21
7x + (4 * -3 + 2x * -3) = 9 + x + -21
7x + (-12 + -6x) = 9 + x + -21

Reorder the terms:
-12 + 7x + -6x = 9 + x + -21

Combine like terms: 7x + -6x = 1x
-12 + 1x = 9 + x + -21

Reorder the terms:
-12 + 1x = 9 + -21 + x

Combine like terms: 9 + -21 = -12
-12 + 1x = -12 + x

Add '12' to each side of the equation.
-12 + 12 + 1x = -12 + 12 + x

Combine like terms: -12 + 12 = 0
0 + 1x = -12 + 12 + x
1x = -12 + 12 + x

Combine like terms: -12 + 12 = 0
1x = 0 + x
1x = x

Solving
1x = x

Solving for variable 'x'.

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

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

Combine like terms: 1x + -1x = 0
0 = x + -1x

Combine like terms: x + -1x = 0
0 = 0

Simplifying
0 = 0

The solution to this equation could not be determined.

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