-28=-7(3x-4)-21x

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Solution for -28=-7(3x-4)-21x equation:


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

Reorder the terms:
-28 = -7(-4 + 3x) + -21x
-28 = (-4 * -7 + 3x * -7) + -21x
-28 = (28 + -21x) + -21x

Combine like terms: -21x + -21x = -42x
-28 = 28 + -42x

Solving
-28 = 28 + -42x

Solving for variable 'x'.

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

Add '42x' to each side of the equation.
-28 + 42x = 28 + -42x + 42x

Combine like terms: -42x + 42x = 0
-28 + 42x = 28 + 0
-28 + 42x = 28

Add '28' to each side of the equation.
-28 + 28 + 42x = 28 + 28

Combine like terms: -28 + 28 = 0
0 + 42x = 28 + 28
42x = 28 + 28

Combine like terms: 28 + 28 = 56
42x = 56

Divide each side by '42'.
x = 1.333333333

Simplifying
x = 1.333333333

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