Solve the equation for y. 5x – 7y = 10 A. y=-7/5x-7/10 B.y=7/5x+10/5 C.y=5/7x-10/7 D.y=-5x-7

i think D

Question

Solve the equation for y.  5x – 7y = 10      A. y=-7/5x-7/10      B.y=7/5x+10/5      C.y=5/7x-10/7      D.y=-5x-7 

i think D

563blackghost · Answer

We need to isolate y.....so lets write the problem down...

$\huge{5x-7y=10}$ Lets first get rid of `5x` so we would subtract `5x` from both sides...

$\huge{(5x-5x)-7y=-5x+10}$

What would that equal?

koolkid98 · Answer

-7y=-5+10

koolkid98 · Answer

opps im mean -7y=-5x+10

563blackghost · Answer

Nice but dont forget the `x` :)

Now we have...

$\huge{-7y=-5x+10}$ Now we need `y` to itself so we would divide by `-7` since it is being multiplied with `y`. So....

$\huge{\frac{-7y}{-7}=\frac {-5}{-7}x + \frac{10}{-7}}$

Now what would that equal?

koolkid98 · Answer

$$\frac{ -7y }{ -7 }$$ would = y or 1y

563blackghost · Answer

-7 over -7 cancels and we are left with y :)