-7x-21=-4x+20

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Solution for -7x-21=-4x+20 equation:


Simplifying
-7x + -21 = -4x + 20

Reorder the terms:
-21 + -7x = -4x + 20

Reorder the terms:
-21 + -7x = 20 + -4x

Solving
-21 + -7x = 20 + -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.
-21 + -7x + 4x = 20 + -4x + 4x

Combine like terms: -7x + 4x = -3x
-21 + -3x = 20 + -4x + 4x

Combine like terms: -4x + 4x = 0
-21 + -3x = 20 + 0
-21 + -3x = 20

Add '21' to each side of the equation.
-21 + 21 + -3x = 20 + 21

Combine like terms: -21 + 21 = 0
0 + -3x = 20 + 21
-3x = 20 + 21

Combine like terms: 20 + 21 = 41
-3x = 41

Divide each side by '-3'.
x = -13.66666667

Simplifying
x = -13.66666667

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