Solve this system of equations using the addition method.
x+y=12
x-y=4 @Mathematic Solve this system of equations using the addition method.
x+y=12
x-y=4 @Mathematic @Mathematics

Question

hoblos · Answer

x=8    y=4

hero · Answer

Add the two equations togther;  y is eliminated. Solve for x: 

2x = 16

x = 8
y=4

anonymous · Answer

o ok so like for x+y=3 and 2x-y+0 i add x+2x which gives me 3x then i add yand-y which gives me 0 and then 3 and 0 which is 3 so it would be 3x+0=3

anonymous · Answer

that looks wrong i did sumthin wrong

anonymous · Answer

what's x+x?
what's y+(-y)?
what's 12+4?

2x+0=16
2x=16
divide by 2.

x=8

plug the x back into one of the starting equations.