4(x+21)=-3(x-21)

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


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

Reorder the terms:
4(21 + x) = -3(x + -21)
(21 * 4 + x * 4) = -3(x + -21)
(84 + 4x) = -3(x + -21)

Reorder the terms:
84 + 4x = -3(-21 + x)
84 + 4x = (-21 * -3 + x * -3)
84 + 4x = (63 + -3x)

Solving
84 + 4x = 63 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
84 + 4x + 3x = 63 + -3x + 3x

Combine like terms: 4x + 3x = 7x
84 + 7x = 63 + -3x + 3x

Combine like terms: -3x + 3x = 0
84 + 7x = 63 + 0
84 + 7x = 63

Add '-84' to each side of the equation.
84 + -84 + 7x = 63 + -84

Combine like terms: 84 + -84 = 0
0 + 7x = 63 + -84
7x = 63 + -84

Combine like terms: 63 + -84 = -21
7x = -21

Divide each side by '7'.
x = -3

Simplifying
x = -3

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