Answer:
x=1 y=7
Step-by-step explanation:
−5x+2y=9
y=7x
Substitute the second equation into the first
-5x +2(7x) = 9
Distribute
-5x +14x = 9
Combine like terms
9x=9
Divide by 9
9x/9 =9/9
x= 1
Now find y
y = 7(1)
y = 7
The value of the first one is negative 13 the second 6
Answer:
Step-by-step explanation: The restocking fee (P) is 5 percent of the total cost of the item (C) that was purchased. 5% can be expressed as .05 for the equation.
so, P = .05C
26x3=78
78-x=72
x=6
She needs to buy at least 6 more to have enough for 26 students
