Question

What is the value of x in the equation 4x + 8y = 40, when y = 0.8?


4.6

8.4

10

1

Answer 1

you could do this two ways you can solve for x and then plug in y, do you know how to do this?

Answer 2

subtract 8y from both sides to get this \[40-8y = 4x\]

Answer 3

divide both sides by 4
\[(40-8y)/(4) = x \]

this gives you

10-2y = x

Answer 4

plug in y = 0.8

Answer 5

10-2(8/10) = 8.4 does this make sense? @apalmer004 ?

Answer 6

Yes, thank you.

Answer 7

excellent, no problem