Solve using elimination method.

x+3y=-1
2x-y=5

x=2, y=-1

Step-by-step explanation:

Same process as before, you should seriously ask your teacher for help/pay more attention in class. It helped me learn how to do it.

If you really want to learn it, read here:

http://mathsfirst.massey.ac.nz/Algebra/SystemsofLinEq/EMeth.htm

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!