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

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


Simplifying
(9 + -1x) + (10 + -1x) + 3 = 20

Remove parenthesis around (9 + -1x)
9 + -1x + (10 + -1x) + 3 = 20

Remove parenthesis around (10 + -1x)
9 + -1x + 10 + -1x + 3 = 20

Reorder the terms:
9 + 10 + 3 + -1x + -1x = 20

Combine like terms: 9 + 10 = 19
19 + 3 + -1x + -1x = 20

Combine like terms: 19 + 3 = 22
22 + -1x + -1x = 20

Combine like terms: -1x + -1x = -2x
22 + -2x = 20

Solving
22 + -2x = 20

Solving for variable 'x'.

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

Add '-22' to each side of the equation.
22 + -22 + -2x = 20 + -22

Combine like terms: 22 + -22 = 0
0 + -2x = 20 + -22
-2x = 20 + -22

Combine like terms: 20 + -22 = -2
-2x = -2

Divide each side by '-2'.
x = 1

Simplifying
x = 1

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