\begin{aligned} & -5y+8x = -18 &5y+2x = 58 \end{aligned}


−5y+8x=−18
5y+2x=58

x=4, y=10

Step-by-step explanation:

−5y+8x=−18

5y+2x=58

Add the two equations together to eliminate y

−5y+8x=−18

5y+2x=58

10x = 40

Divide by 10

10x/10 = 40/10

x = 4

Now we need to find y

5y +2(4) = 58

5y+8 = 58

Subtract 8 from each side

5y+8-8 = 58-8

5y = 50

Divide by 5

5y/5= 50/5

y= 10

answer: all the values are within because it has a pattern that repeats from -6 to 4.

good luck!

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!