21+7x=4x-36

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Solution for 21+7x=4x-36 equation:


Simplifying
21 + 7x = 4x + -36

Reorder the terms:
21 + 7x = -36 + 4x

Solving
21 + 7x = -36 + 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 = -36 + 4x + -4x

Combine like terms: 7x + -4x = 3x
21 + 3x = -36 + 4x + -4x

Combine like terms: 4x + -4x = 0
21 + 3x = -36 + 0
21 + 3x = -36

Add '-21' to each side of the equation.
21 + -21 + 3x = -36 + -21

Combine like terms: 21 + -21 = 0
0 + 3x = -36 + -21
3x = -36 + -21

Combine like terms: -36 + -21 = -57
3x = -57

Divide each side by '3'.
x = -19

Simplifying
x = -19

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