1x+3y=7

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Solution for 1x+3y=7 equation: 


Simplifying
1x + 3y = 7

Solving
1x + 3y = 7

Solving for variable 'x'.

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

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

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

Divide each side by '1'.
x = 7 + -3y

Simplifying
x = 7 + -3y

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