-7+21=-4x

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


Simplifying
-7 + 21 = -4x

Combine like terms: -7 + 21 = 14
14 = -4x

Solving
14 = -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.
14 + 4x = -4x + 4x

Combine like terms: -4x + 4x = 0
14 + 4x = 0

Add '-14' to each side of the equation.
14 + -14 + 4x = 0 + -14

Combine like terms: 14 + -14 = 0
0 + 4x = 0 + -14
4x = 0 + -14

Combine like terms: 0 + -14 = -14
4x = -14

Divide each side by '4'.
x = -3.5

Simplifying
x = -3.5

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