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 = -1x
-24 + -1x = 21

Solving
-24 + -1x = 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 + -1x = 21 + 24

Combine like terms: -24 + 24 = 0
0 + -1x = 21 + 24
-1x = 21 + 24

Combine like terms: 21 + 24 = 45
-1x = 45

Divide each side by '-1'.
x = -45

Simplifying
x = -45

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