3+7x-x=-21

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Solution for 3+7x-x=-21 equation:


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

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

Solving
3 + 6x = -21

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 6x = -21 + -3

Combine like terms: 3 + -3 = 0
0 + 6x = -21 + -3
6x = -21 + -3

Combine like terms: -21 + -3 = -24
6x = -24

Divide each side by '6'.
x = -4

Simplifying
x = -4

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