Solve algebraically
x-4y=-10
x+y=5

if x+y=5, then x=5-y

so x-4y=-10

5-y-4y=-10

5-5y=-10

-5y=-15

y=3

x=5-y

x=5-3

x=2

x=2; y=3

after simplifying it i got: -36.25 as my answer. hope that !

77

step-by-step explanation: