SOLUTION: I need help I'm studying a test and my teacher gave me thee 8 problems as a review. I know that is is a little much to do 8 problems but I do not no what to do at all then I will

Question 833949: I need help I'm studying a test and my teacher gave me thee 8 problems as a review. I know that is is a little much to do 8 problems but I do not no what to do at all then I will just fail the test
Thank u
Btw these are 2x2
Y=2x-10
2y=x-8
Y=-x+4
Y=3x
2y=x+1
-2x-y=7
X+2y=14
Y=3x-14
2x-3y=14
Y=1/2x-7/2
-3x-2y=5.5
X+3y=7.5
6x-4y=54
-9x+2y=-69
Y=-x/2-4
-2x-y=-5
Please answer these questions ASAP I need them for tonight so I can study also answer them in substition
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
Y=2x-10
2y=x-8
Y=-x+4
-------------
y is solved for, so sub for y in the 1st eqn
2y = x - 8
2(x-4) = x-8
2x-8 = x-8
x-8 = -8
x = 0
---
y = 4
===============================
Y=3x
2y=x+1
Same as above
===============================
-2x-y=7
X+2y=14
Solve for x or y in 1 eqn, then sub into the other.
=================
Y=3x-14
2x-3y=14
Same as #1
=================
Y=1/2x-7/2
-3x-2y=5.5
------
X+3y=7.5
6x-4y=54
----------
-9x+2y=-69
Y=-x/2-4
-2x-y=-5

RELATED QUESTIONS
Hi. Im going into 8th grade and my teacher gave us homework to do over the summer. I cant (answered by Theo)

Find the age of me "in 12 years i will be three times as old as i was 32 years ago"... (answered by josgarithmetic)

i don't get math at all because my math teacher sucks anyway i need help understanding... (answered by jim_thompson5910)

I have been studying all day and doing practice problems from my math book to get me... (answered by Jeef Gorrdon,richwmiller)

(3i)-(7i)-(-1-i) My teacher gave me the answer which is 1-(3i) I can not figure out... (answered by checkley77,nerdybill,Mathtut)

tutors i need help with alg 2 i have a 72 in the class because i couple bad test scores... (answered by Earlsdon)

Hey! My name is Lacey and my teacher gave me the opportunity for extra credit with a... (answered by checkley77,jim_thompson5910)

Please help me with this stuff I don't know much about it and I am on the verge of... (answered by askmemath)

Hi there! I just started highschool at a collegiate school. I am so thankful I got in,... (answered by Alan3354,ikleyn)