Respuesta :

kayleyroof

Answer:

For problem 15 it's y=15/4-7x

For problem 13 it's x=31-5y/6

Step-by-step explanation:

Problem 15:

y(4-7x)=15

y=15/4-7x

Problem 13:

6x=31-5y

x=31-5y/6

ghaithgh

Answer:

13) Ans;

[tex]6x + 5y = 31 \\ 6x = 31 - 5y \\ \\ x = \frac{31 - 5y}{6} \\ \\ x = \frac{31}{6} - \frac{5y}{6} [/tex]

15)Ans;

[tex]4y - 7xy = 15 \\ y(4 - 7x) = 15 \\ \\ y = \frac{15}{4 - 7x} [/tex]

I hope I helped you^_^