32.0k views
13 votes
Help plz

write the expression you can substitute for x in 3x-2y=8 to solve the system below.
x= 5y - 6
3x - 2y = 8

plz put step by step how you got the answer

User Frederic
by
3.2k points

2 Answers

7 votes
1. 3(5y-6)-2y=8 b/c x=x so u can just substitute it into the equation u are trying to solve
2. 15y-18-2y=8 now do the parenthesis first
3. 13y-18=8 now combine like terms in this case subtract 15y from 2y
4. 13y=26 add 18 to both sides
5. Y=2 lastly divide both sides by 13 to get the y by it’s self to get y
But if you are also looking for x all u have to do is find the answer to x=5(2)-6 which is 4
-I hope this helped
User Ofirov
by
3.2k points
14 votes
3(5y-6)-2y=8
15y-18-2y=8
13y-18=8
13y=26
y=2
That is because you have the expression you can substitute it on the system.( hope this helps)
User Thira
by
3.2k points