3x+y+7=18

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Solution for 3x+y+7=18 equation:


Simplifying
3x + y + 7 = 18

Reorder the terms:
7 + 3x + y = 18

Solving
7 + 3x + y = 18

Solving for variable 'x'.

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

Add '-7' to each side of the equation.
7 + 3x + -7 + y = 18 + -7

Reorder the terms:
7 + -7 + 3x + y = 18 + -7

Combine like terms: 7 + -7 = 0
0 + 3x + y = 18 + -7
3x + y = 18 + -7

Combine like terms: 18 + -7 = 11
3x + y = 11

Add '-1y' to each side of the equation.
3x + y + -1y = 11 + -1y

Combine like terms: y + -1y = 0
3x + 0 = 11 + -1y
3x = 11 + -1y

Divide each side by '3'.
x = 3.666666667 + -0.3333333333y

Simplifying
x = 3.666666667 + -0.3333333333y

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