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

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


Simplifying
4(x + 28) + -3(-1x + 28) = 21

Reorder the terms:
4(28 + x) + -3(-1x + 28) = 21
(28 * 4 + x * 4) + -3(-1x + 28) = 21
(112 + 4x) + -3(-1x + 28) = 21

Reorder the terms:
112 + 4x + -3(28 + -1x) = 21
112 + 4x + (28 * -3 + -1x * -3) = 21
112 + 4x + (-84 + 3x) = 21

Reorder the terms:
112 + -84 + 4x + 3x = 21

Combine like terms: 112 + -84 = 28
28 + 4x + 3x = 21

Combine like terms: 4x + 3x = 7x
28 + 7x = 21

Solving
28 + 7x = 21

Solving for variable 'x'.

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

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

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

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

Divide each side by '7'.
x = -1

Simplifying
x = -1

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