Question

Does anyone know the answer to this. I have tried sm times.

Answer 1

Answer:

sandrea is correct

Step-by-step explanation:

Fernando is incorrect because when he brought over the 4a to the other side, he removed the negative sign from the 5b.

also, there shouldn't really be a negative number in the denominator, so the answer should really be :

(-7 + 4b)/5

but sandrea is still correct

Answer 2

Answer and Step-by-step explanation:

Sandrea solved for b correctly.

Both are given the equation 4a - 5b = 7

To solve, we have to get b by itself, so first we subtract 4a from both sides of the equation.

(4a - 5b) - 4a = (7) - 4a

-5b = 7 - 4a

Now we divide both sides of the equation by -5.

$\frac{-5b}{-5}=\frac{7-4a}{-5} \\\\b = -\frac{7-4a}{5}$<- That is your final answer.

Fernando got rid of the negative when subtracting 4a from both sides of the equation.

#teamtrees #PAW (Plant And Water)

I hope this helps!