Question 147457


{{{-3y=x+3}}} Start with the given equation.



{{{-3*(-6)=(15)+3}}} Plug in {{{x=15}}} and {{{y=-6}}}.



{{{18=(15)+3}}} Evaluate and simplify the left side.



{{{18=18}}} Evaluate and simplify the right side.



Since the equation is <b>true</b>, this means that (15,-6) is a solution.



{{{2y=4x-72}}} Start with the given equation.



{{{2*(-6)=4*(15)-72}}} Plug in {{{x=15}}} and {{{y=-6}}}.



{{{-12=4*(15)-72}}} Evaluate and simplify the left side.



{{{-12=-12}}} Evaluate and simplify the right side.



Since the equation is <b>true</b>, this means that (15,-6) is a solution.



Since <font size="4"><b>all</b></font> of the equations of the system are true, this means that (15,-6) is a solution