19-(15-x)=20-x

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Solution for 19-(15-x)=20-x equation:


Simplifying
19 + -1(15 + -1x) = 20 + -1x
19 + (15 * -1 + -1x * -1) = 20 + -1x
19 + (-15 + 1x) = 20 + -1x

Combine like terms: 19 + -15 = 4
4 + 1x = 20 + -1x

Solving
4 + 1x = 20 + -1x

Solving for variable 'x'.

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

Add 'x' to each side of the equation.
4 + 1x + x = 20 + -1x + x

Combine like terms: 1x + x = 2x
4 + 2x = 20 + -1x + x

Combine like terms: -1x + x = 0
4 + 2x = 20 + 0
4 + 2x = 20

Add '-4' to each side of the equation.
4 + -4 + 2x = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 2x = 20 + -4
2x = 20 + -4

Combine like terms: 20 + -4 = 16
2x = 16

Divide each side by '2'.
x = 8

Simplifying
x = 8

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