Question

5x + 2y = 8
x + y = 4

If you want to solve the system of equations by addition, which of the following could you do?
Multiply the second equation by 5 and add.
Multiply the second equation by 2 and add.
Multiply the second equation by -2 and add.

Answer 1

ok

Answer 2

no picture

Answer 3

what do you think?
here they are asking you to solve using elimination method

Answer 4

no

Answer 5

yes

Answer 6

Multiply the second equation by -2 and add.

Answer 7

You need to eliminate either the x or y variable. Follow each of the given scenarios and whichever method causes the x or y to be eliminated would be the correct answer.

Answer 8

You could also multiply the second equation by -5 and add , "but that's not one of the choices "

Answer 9

5x+2y =8
x+y=4

Step 1) Multiply the 2nd equation by -5, so one of the variables cancel out
5x+2y=8 → 5x+2y=8
-5(x+y=4) → -5x-5y=-20
Step 2) Then add together the equations. The X's should cancel out.
-3y=-12
Step 3) Then solve the equation
-3y=-12
--- ----
-3 -3

y=4
That should be your y answer and to find the x just place in the 4 in the y of the equation. Just tell me if you need x