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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