Solve the system by substitution. plzzz help me its a test

(-10,10)

Step-by-step explanation:

3x+5y=20

3(-y)+5y=20

-3y+5y=20

2y=20

y=10

x= -10

or

(-10,10)

they will manufacture 8496 cars

answer: 16

step-by-step explanation: first you would add 6+6 which equals 12 then add 2+2 which equals 4. then add 12 + 4 which is 16.

hope this ^_^