Question 102842
Start with the given system


{{{5x+4y=16}}}
{{{y=-16}}}




{{{5x+4(-16)=16}}} Plug in {{{y=-16}}}



{{{5x-64=16}}} Multiply



{{{5x=16+64}}}Add 64 to both sides



{{{5x=80}}} Combine like terms on the right side



{{{x=(80)/(5)}}} Divide both sides by 5 to isolate x




{{{x=16}}} Divide


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Answer:

So our answer is {{{x=16}}} 




So our solution is {{{x=16}}} and {{{y=-16}}}