5x+y=30
y=30-5x
3x+4(30-5x)=52
3x+120-20x=52
-17x+120=52
-17x=-68
x=4
5(4)+y=30
20+y=30
y=10
8(4)-2(10)
32-20
12
So the value of 8x-2y is 12 where x=4 and y=10
the correct answer is you spend $55.78 more in a brand store that buy ing in a normal store.
step-by-step explanation:
brand = spend $ 135.85 total
store = spend $80.07 total