-21-5x=4(7-3x)

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Solution for -21-5x=4(7-3x) equation:


Simplifying
-21 + -5x = 4(7 + -3x)
-21 + -5x = (7 * 4 + -3x * 4)
-21 + -5x = (28 + -12x)

Solving
-21 + -5x = 28 + -12x

Solving for variable 'x'.

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

Add '12x' to each side of the equation.
-21 + -5x + 12x = 28 + -12x + 12x

Combine like terms: -5x + 12x = 7x
-21 + 7x = 28 + -12x + 12x

Combine like terms: -12x + 12x = 0
-21 + 7x = 28 + 0
-21 + 7x = 28

Add '21' to each side of the equation.
-21 + 21 + 7x = 28 + 21

Combine like terms: -21 + 21 = 0
0 + 7x = 28 + 21
7x = 28 + 21

Combine like terms: 28 + 21 = 49
7x = 49

Divide each side by '7'.
x = 7

Simplifying
x = 7

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