X+Y+(X+9)=30

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Solution for X+Y+(X+9)=30 equation:


Simplifying
X + Y + (X + 9) = 30

Reorder the terms:
X + Y + (9 + X) = 30

Remove parenthesis around (9 + X)
X + Y + 9 + X = 30

Reorder the terms:
9 + X + X + Y = 30

Combine like terms: X + X = 2X
9 + 2X + Y = 30

Solving
9 + 2X + Y = 30

Solving for variable 'X'.

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

Add '-9' to each side of the equation.
9 + 2X + -9 + Y = 30 + -9

Reorder the terms:
9 + -9 + 2X + Y = 30 + -9

Combine like terms: 9 + -9 = 0
0 + 2X + Y = 30 + -9
2X + Y = 30 + -9

Combine like terms: 30 + -9 = 21
2X + Y = 21

Add '-1Y' to each side of the equation.
2X + Y + -1Y = 21 + -1Y

Combine like terms: Y + -1Y = 0
2X + 0 = 21 + -1Y
2X = 21 + -1Y

Divide each side by '2'.
X = 10.5 + -0.5Y

Simplifying
X = 10.5 + -0.5Y

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