(3x-5)+(x+21)=

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


Simplifying
(3x + -5) + (x + 21) = 0

Reorder the terms:
(-5 + 3x) + (x + 21) = 0

Remove parenthesis around (-5 + 3x)
-5 + 3x + (x + 21) = 0

Reorder the terms:
-5 + 3x + (21 + x) = 0

Remove parenthesis around (21 + x)
-5 + 3x + 21 + x = 0

Reorder the terms:
-5 + 21 + 3x + x = 0

Combine like terms: -5 + 21 = 16
16 + 3x + x = 0

Combine like terms: 3x + x = 4x
16 + 4x = 0

Solving
16 + 4x = 0

Solving for variable 'x'.

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

Add '-16' to each side of the equation.
16 + -16 + 4x = 0 + -16

Combine like terms: 16 + -16 = 0
0 + 4x = 0 + -16
4x = 0 + -16

Combine like terms: 0 + -16 = -16
4x = -16

Divide each side by '4'.
x = -4

Simplifying
x = -4

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