2x+21=-5x+84

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Solution for 2x+21=-5x+84 equation:


Simplifying
2x + 21 = -5x + 84

Reorder the terms:
21 + 2x = -5x + 84

Reorder the terms:
21 + 2x = 84 + -5x

Solving
21 + 2x = 84 + -5x

Solving for variable 'x'.

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

Add '5x' to each side of the equation.
21 + 2x + 5x = 84 + -5x + 5x

Combine like terms: 2x + 5x = 7x
21 + 7x = 84 + -5x + 5x

Combine like terms: -5x + 5x = 0
21 + 7x = 84 + 0
21 + 7x = 84

Add '-21' to each side of the equation.
21 + -21 + 7x = 84 + -21

Combine like terms: 21 + -21 = 0
0 + 7x = 84 + -21
7x = 84 + -21

Combine like terms: 84 + -21 = 63
7x = 63

Divide each side by '7'.
x = 9

Simplifying
x = 9

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