9x-2(4x+10)+2=21

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Solution for 9x-2(4x+10)+2=21 equation:


Simplifying
9x + -2(4x + 10) + 2 = 21

Reorder the terms:
9x + -2(10 + 4x) + 2 = 21
9x + (10 * -2 + 4x * -2) + 2 = 21
9x + (-20 + -8x) + 2 = 21

Reorder the terms:
-20 + 2 + 9x + -8x = 21

Combine like terms: -20 + 2 = -18
-18 + 9x + -8x = 21

Combine like terms: 9x + -8x = 1x
-18 + 1x = 21

Solving
-18 + 1x = 21

Solving for variable 'x'.

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

Add '18' to each side of the equation.
-18 + 18 + 1x = 21 + 18

Combine like terms: -18 + 18 = 0
0 + 1x = 21 + 18
1x = 21 + 18

Combine like terms: 21 + 18 = 39
1x = 39

Divide each side by '1'.
x = 39

Simplifying
x = 39

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