Please help me with my math (R-2 writing equations and how many) ( please show your work)

answer: its the third option.

step-by-step explanation:

i just took the test.

apex answer is: true.

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