7 (x+4) 3x + 12 + x - 5

x= -7

Step-by-step explanation:

7(x+4) 3x+12+x-5

7x+28=3x+12+x-5

28-12+5= 3x+x-7x

28-7=-3x

21=-3x

-3x=21

Divide both sides by -3

X= -7

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated