5x+9x-84=42-7x

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Solution for 5x+9x-84=42-7x equation:


Simplifying
5x + 9x + -84 = 42 + -7x

Reorder the terms:
-84 + 5x + 9x = 42 + -7x

Combine like terms: 5x + 9x = 14x
-84 + 14x = 42 + -7x

Solving
-84 + 14x = 42 + -7x

Solving for variable 'x'.

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

Add '7x' to each side of the equation.
-84 + 14x + 7x = 42 + -7x + 7x

Combine like terms: 14x + 7x = 21x
-84 + 21x = 42 + -7x + 7x

Combine like terms: -7x + 7x = 0
-84 + 21x = 42 + 0
-84 + 21x = 42

Add '84' to each side of the equation.
-84 + 84 + 21x = 42 + 84

Combine like terms: -84 + 84 = 0
0 + 21x = 42 + 84
21x = 42 + 84

Combine like terms: 42 + 84 = 126
21x = 126

Divide each side by '21'.
x = 6

Simplifying
x = 6

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