X+y+9z=-8

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Solution for X+y+9z=-8 equation:


Simplifying
X + y + 9z = -8

Solving
X + y + 9z = -8

Solving for variable 'X'.

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

Add '-1y' to each side of the equation.
X + y + -1y + 9z = -8 + -1y

Combine like terms: y + -1y = 0
X + 0 + 9z = -8 + -1y
X + 9z = -8 + -1y

Add '-9z' to each side of the equation.
X + 9z + -9z = -8 + -1y + -9z

Combine like terms: 9z + -9z = 0
X + 0 = -8 + -1y + -9z
X = -8 + -1y + -9z

Simplifying
X = -8 + -1y + -9z

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