-6x+7y=21

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Solution for -6x+7y=21 equation: 


Simplifying
-6x + 7y = 21

Solving
-6x + 7y = 21

Solving for variable 'x'.

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

Add '-7y' to each side of the equation.
-6x + 7y + -7y = 21 + -7y

Combine like terms: 7y + -7y = 0
-6x + 0 = 21 + -7y
-6x = 21 + -7y

Divide each side by '-6'.
x = -3.5 + 1.166666667y

Simplifying
x = -3.5 + 1.166666667y

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