2x+3(x-8)=21

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Solution for 2x+3(x-8)=21 equation: 


Simplifying
2x + 3(x + -8) = 21

Reorder the terms:
2x + 3(-8 + x) = 21
2x + (-8 * 3 + x * 3) = 21
2x + (-24 + 3x) = 21

Reorder the terms:
-24 + 2x + 3x = 21

Combine like terms: 2x + 3x = 5x
-24 + 5x = 21

Solving
-24 + 5x = 21

Solving for variable 'x'.

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

Add '24' to each side of the equation.
-24 + 24 + 5x = 21 + 24

Combine like terms: -24 + 24 = 0
0 + 5x = 21 + 24
5x = 21 + 24

Combine like terms: 21 + 24 = 45
5x = 45

Divide each side by '5'.
x = 9

Simplifying
x = 9

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