Step-by-step explanation:
the illustration is not with the question
Answer:
40
Step-by-step explanation:
3x + 7y
Replace the letters with said numbers,
3(4) + 7(4)
Multiply,
12 + 28
And add!
40
After multiplying by the stated coefficients and adding, the equation obtained is:
8y - 7.5y = 0
y = 0
x = 4
Because the two equations formed were independent, they had one solution.
Been a bit since i’ve done this kind of problem.
X+4=20
X is the number of hours needed to work, while 4 is the hours already there.
