(3x-10)+9=20

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Solution for (3x-10)+9=20 equation:


Simplifying
(3x + -10) + 9 = 20

Reorder the terms:
(-10 + 3x) + 9 = 20

Remove parenthesis around (-10 + 3x)
-10 + 3x + 9 = 20

Reorder the terms:
-10 + 9 + 3x = 20

Combine like terms: -10 + 9 = -1
-1 + 3x = 20

Solving
-1 + 3x = 20

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 3x = 20 + 1

Combine like terms: -1 + 1 = 0
0 + 3x = 20 + 1
3x = 20 + 1

Combine like terms: 20 + 1 = 21
3x = 21

Divide each side by '3'.
x = 7

Simplifying
x = 7

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