x+-3+-7x=21

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


Simplifying
x + -3 + -7x = 21

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

Combine like terms: x + -7x = -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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