Answer:
Step-by-step explanation:
Remark
You could do it a very convoluted way or you could do it simply. The simple way, I think, is the one intended. The x on the second equation is sitting by it itself. So is it in the first equation. Put the x from the first equation into the second.
Solution
x=6y+3 ===> x+2y=5.
6y + 3 + 2y = 5 First Step
8y + 3 = 5 Subtract 3 from both sides
8y = 5 - 3 Combine
8y = 2 Divide by 8
y = 2/8
y = 1/4
============================
x = 6y + 3
x = 6*(1/4) + 3
x = 6/4 + 3
x = 1.5 + 3
x = 4.5
Solution (4.5 , 0.25)
