21=3x-7(-2x+14)

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Solution for 21=3x-7(-2x+14) equation:


Simplifying
21 = 3x + -7(-2x + 14)

Reorder the terms:
21 = 3x + -7(14 + -2x)
21 = 3x + (14 * -7 + -2x * -7)
21 = 3x + (-98 + 14x)

Reorder the terms:
21 = -98 + 3x + 14x

Combine like terms: 3x + 14x = 17x
21 = -98 + 17x

Solving
21 = -98 + 17x

Solving for variable 'x'.

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

Add '-17x' to each side of the equation.
21 + -17x = -98 + 17x + -17x

Combine like terms: 17x + -17x = 0
21 + -17x = -98 + 0
21 + -17x = -98

Add '-21' to each side of the equation.
21 + -21 + -17x = -98 + -21

Combine like terms: 21 + -21 = 0
0 + -17x = -98 + -21
-17x = -98 + -21

Combine like terms: -98 + -21 = -119
-17x = -119

Divide each side by '-17'.
x = 7

Simplifying
x = 7

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