Question

20 points and brainliest if answered correctly

Answer 1

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:

$x=4$