Answer:
10
Step-by-step explanation
4(a+10) = 80
4a+40=80
4a=40
a=10
x= r - h/y subtract r from both sides
x-r = -h/y multiply each side by -y
-y(x-r) = h
-xy +yr = h
her total money = 1500 + 250
= $1750
expenditure= 122 + 287 + 61
= $470
left over money = 1750 - 470
= $1280
