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iogann1982 [59]
2 years ago
9

20 points and brainliest if answered correctly

Mathematics
1 answer:
Elena L [17]2 years ago
5 0

Answer:

y=9,x=4

Step-by-step explanation:

System of equations:

x+y=13

60x+80y=960

_____________

simplify:(isolate x)

x=\frac{4(-y+12)}{3}

x+y=13\\

substitute equation for x into second equation:

\frac{4(-y+12)}{3} +y=13\\

simplify:

\frac{-y+48}{3}=13\\ y=9\\

substitute y into equation for x:

x=4

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