is (-4,7) a solution of 9x-7y=9
Substitute x=-4 and y=7 into the equation.
If the left-hand-side evaluates to 9, then (-4,7) is a solution of the given equation.
Post if more help is needed.
If the left-hand-side evaluates to 9, then (-4,7) is a solution of the given equation.
Post if more help is needed.