3(x+5)-5x=21

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


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

Reorder the terms:
3(5 + x) + -5x = 21
(5 * 3 + x * 3) + -5x = 21
(15 + 3x) + -5x = 21

Combine like terms: 3x + -5x = -2x
15 + -2x = 21

Solving
15 + -2x = 21

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + -2x = 21 + -15

Combine like terms: 15 + -15 = 0
0 + -2x = 21 + -15
-2x = 21 + -15

Combine like terms: 21 + -15 = 6
-2x = 6

Divide each side by '-2'.
x = -3

Simplifying
x = -3

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