Answer:
40x - 5y = -40x - 5(4x + y) = -40x - 20x - 5(7) = -60x - 35
Explanation:
To find the value of -5(4x+y), we first need to simplify the expression inside the parentheses:
-5(4x + y) = -5(4x) - 5(y) = -20x - 5y
Now, we can substitute the value of y from the given equation:
-20x - 5y = -20x - 5(4x + y) = -20x - 20x - 5y = -40x - 5y
Since we know that 4x + y = 7, we can substitute this into the above equation:
-40x - 5y = -40x - 5(4x + y) = -40x - 20x - 5(7) = -60x - 35