What is the answer to
4x-5y=-12
-x+5y=18

4x-5y=-12

-x+5y=18

find x first by eliminating y

add both of the equations

4x+-x-5y+5y=-12+18

4x-x=-12+18

3x=-12+18

3x=6

divide both sides by 3 to get x by itself

3x/3=6/3

x=2

find y by using the substitution method

-x+5y=18

-2+5y=18

move -2 to the other side

-2+2+5y=18+2

5y=20

divide both sides by 5 to get y by itself

5y/5=20/5

y=4

(2,4)

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150