X+Y-15=345

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Solution for X+Y-15=345 equation:


Simplifying
X + Y + -15 = 345

Reorder the terms:
-15 + X + Y = 345

Solving
-15 + X + Y = 345

Solving for variable 'X'.

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

Add '15' to each side of the equation.
-15 + X + 15 + Y = 345 + 15

Reorder the terms:
-15 + 15 + X + Y = 345 + 15

Combine like terms: -15 + 15 = 0
0 + X + Y = 345 + 15
X + Y = 345 + 15

Combine like terms: 345 + 15 = 360
X + Y = 360

Add '-1Y' to each side of the equation.
X + Y + -1Y = 360 + -1Y

Combine like terms: Y + -1Y = 0
X + 0 = 360 + -1Y
X = 360 + -1Y

Simplifying
X = 360 + -1Y

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