Question

20 POINT QUESTION

Answer 1

8x + 7y =89

2x + 5y=45

You want to be able to subtract one away from the other one so you are just left with either x or y. to do this we could multiply the bottom equation by 4

so you would get

8x+7y=89

8x + 20y= 180

Now we can subtract equation 1 from equation 2 so you get

13y=91

this gives you y=7 so to find x we can simply substitute y into an equation;

2x + 5x7=45

2x + 35= 45

2x = 10

x =5

so the final answer is y = 7/ x = 5