21=3x+5(-2x+14)

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Solution for 21=3x+5(-2x+14) equation:


Simplifying
21 = 3x + 5(-2x + 14)

Reorder the terms:
21 = 3x + 5(14 + -2x)
21 = 3x + (14 * 5 + -2x * 5)
21 = 3x + (70 + -10x)

Reorder the terms:
21 = 70 + 3x + -10x

Combine like terms: 3x + -10x = -7x
21 = 70 + -7x

Solving
21 = 70 + -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 = 70 + -7x + 7x

Combine like terms: -7x + 7x = 0
21 + 7x = 70 + 0
21 + 7x = 70

Add '-21' to each side of the equation.
21 + -21 + 7x = 70 + -21

Combine like terms: 21 + -21 = 0
0 + 7x = 70 + -21
7x = 70 + -21

Combine like terms: 70 + -21 = 49
7x = 49

Divide each side by '7'.
x = 7

Simplifying
x = 7

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