Question

solve by elimination 2x-y=19 3y=2x-29

Answer 1

2x-y=19
-2x+3y=-29(signs reversed)
------------------
2y = -10(2x and -2x cancels out)
y=-5..
subsitiute y=-5 into first equation
2x-(-5)=19
2x+5=19
2x=14
x=7

Answer 2

can you please explain it to me?

Answer 3

which part did u not understand

Answer 4

did you add them together or multiply?

Answer 5

there are two equations. i subtracted the second equation. see the signs are reversed.

Answer 6

that way i eliminated 2x

Answer 7

ok but in the 2nd equation how did you getthat far..like ...break it waaay down 4 me =)

Answer 8

2x-y=19---------------(i)
3y=2x-29-------------(ii)

2x-3y=29 (first step is to arrange the equations)
2x-y=19

Answer 9

2x-3y=29
(subtract) -(2x-y)=-(19)

Answer 10

2x-3y=29
-2x+y=-19
---------------------
0-2y=-10

Answer 11

-2y=10

Answer 12

-y=10/2

Answer 13

-y=5

Answer 14

y=-5

Answer 15

all clear?

Answer 16

got it!