-21=-4(7-2x)+7(1+2x)

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Solution for -21=-4(7-2x)+7(1+2x) equation:


Simplifying
-21 = -4(7 + -2x) + 7(1 + 2x)
-21 = (7 * -4 + -2x * -4) + 7(1 + 2x)
-21 = (-28 + 8x) + 7(1 + 2x)
-21 = -28 + 8x + (1 * 7 + 2x * 7)
-21 = -28 + 8x + (7 + 14x)

Reorder the terms:
-21 = -28 + 7 + 8x + 14x

Combine like terms: -28 + 7 = -21
-21 = -21 + 8x + 14x

Combine like terms: 8x + 14x = 22x
-21 = -21 + 22x

Add '21' to each side of the equation.
-21 + 21 = -21 + 21 + 22x

Combine like terms: -21 + 21 = 0
0 = -21 + 21 + 22x

Combine like terms: -21 + 21 = 0
0 = 0 + 22x
0 = 22x

Solving
0 = 22x

Solving for variable 'x'.

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

Add '-22x' to each side of the equation.
0 + -22x = 22x + -22x
Remove the zero:
-22x = 22x + -22x

Combine like terms: 22x + -22x = 0
-22x = 0

Divide each side by '-22'.
x = 0

Simplifying
x = 0

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