Question

x+2y=16
-x+2y=8 solve by elimination method

Answer 1

y=6

Answer 2

x+2y=16
-x+2y=8 the x's cancel out you get

2y=16
2y=8 Add both equations

4y=24 then divide both sides by 4
y=6

Answer 3

ok then i would plug 6 into the x equation right?

Answer 4

-x+2(6)=8

Answer 5

yes

Answer 6

-x+12=8 x =-4?

Answer 7

no for -x+2y=8 when solve for x (y=6) we get x=4

Answer 8

-x+2y=8
-x+2(6)=8
-x+12=8 subtract 12 from both sides
-x=-4 then divide by -1 both sides. since negative x
x=4

Answer 9

and second equation
x+2y=16
x+2(6)=16 multiply 2*6=12
x+12=16 subtract 12 from both sides
x=4

Answer 10

ok

Answer 11

x+2y=16 -(i
-x+2y=8 -(ii


x+2y=16
-x+2y=8 [+x and -x cancelled]

then ,
4y=24 [adding 2y and 2y ; and 16+8]
or y=24/4
therefore, y=6

Again keeping value of y in equation i, we get,
x+2y=16
or x+2*6=16
or x +12=16
or x=16-12
therefore, x=4