7x+y+3z=20

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Solution for 7x+y+3z=20 equation:


Simplifying
7x + y + 3z = 20

Solving
7x + y + 3z = 20

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.
7x + y + -1y + 3z = 20 + -1y

Combine like terms: y + -1y = 0
7x + 0 + 3z = 20 + -1y
7x + 3z = 20 + -1y

Add '-3z' to each side of the equation.
7x + 3z + -3z = 20 + -1y + -3z

Combine like terms: 3z + -3z = 0
7x + 0 = 20 + -1y + -3z
7x = 20 + -1y + -3z

Divide each side by '7'.
x = 2.857142857 + -0.1428571429y + -0.4285714286z

Simplifying
x = 2.857142857 + -0.1428571429y + -0.4285714286z

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