13+-3(x+-5)=21

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Solution for 13+-3(x+-5)=21 equation:


Simplifying
13 + -3(x + -5) = 21

Reorder the terms:
13 + -3(-5 + x) = 21
13 + (-5 * -3 + x * -3) = 21
13 + (15 + -3x) = 21

Combine like terms: 13 + 15 = 28
28 + -3x = 21

Solving
28 + -3x = 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 + -3x = 21 + -28

Combine like terms: 28 + -28 = 0
0 + -3x = 21 + -28
-3x = 21 + -28

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

Divide each side by '-3'.
x = 2.333333333

Simplifying
x = 2.333333333

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