21=5(x+7)+2x

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Solution for 21=5(x+7)+2x equation:


Simplifying
21 = 5(x + 7) + 2x

Reorder the terms:
21 = 5(7 + x) + 2x
21 = (7 * 5 + x * 5) + 2x
21 = (35 + 5x) + 2x

Combine like terms: 5x + 2x = 7x
21 = 35 + 7x

Solving
21 = 35 + 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.
21 + -7x = 35 + 7x + -7x

Combine like terms: 7x + -7x = 0
21 + -7x = 35 + 0
21 + -7x = 35

Add '-21' to each side of the equation.
21 + -21 + -7x = 35 + -21

Combine like terms: 21 + -21 = 0
0 + -7x = 35 + -21
-7x = 35 + -21

Combine like terms: 35 + -21 = 14
-7x = 14

Divide each side by '-7'.
x = -2

Simplifying
x = -2

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