-21=-7(3+4x)

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Solution for -21=-7(3+4x) equation:


Simplifying
-21 = -7(3 + 4x)
-21 = (3 * -7 + 4x * -7)
-21 = (-21 + -28x)

Add '21' to each side of the equation.
-21 + 21 = -21 + 21 + -28x

Combine like terms: -21 + 21 = 0
0 = -21 + 21 + -28x

Combine like terms: -21 + 21 = 0
0 = 0 + -28x
0 = -28x

Solving
0 = -28x

Solving for variable 'x'.

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

Add '28x' to each side of the equation.
0 + 28x = -28x + 28x
Remove the zero:
28x = -28x + 28x

Combine like terms: -28x + 28x = 0
28x = 0

Divide each side by '28'.
x = 0

Simplifying
x = 0

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