Question

-5x+y=35
3x+2y=-21

Answer 1

Solve it using simultaneous equations.

Answer 2

Multiply the first equation by 3 and the second by 5. After that add those two equations so you can cancel out the x term and get a value for y term.

Answer 3

ya but I need u need u to show me and explain to me?.....

Answer 4

Are you sure that the question is correct?

Answer 5

ya

Answer 6

are you trying to solve this?

Answer 7

yaa

Answer 8

ok

Answer 9

well what you can do is multiply the first equation by two so that the two ys can be eleminated....
-10x+2y=70
minus
3x+2y=-21

Answer 10

-13x=91

Answer 11

divide each side by -13
x=-7

Answer 12

now you have to find y so plug x into one of the equations...
3(-7)+2y=-21

Answer 13

add 21 to each side
2y=0
divide each by 2
y=0

Answer 14

check your work to make sure its right

Answer 15

3(-7)+2(0)=-21
-21=-21
so its correct

Answer 16

any questions?

Answer 17

?

Answer 18

i gtg so if you have any qs ask em now

Answer 19

substitution or elimination?