Question

Can someone help me with substitution?

Answer 1

hi :D ill give it a shot

Answer 2

which ones do we have to do? @sbuck98

Answer 3

I kinda needed them all:(

Answer 4

ill repost each and award a medal amd coins

Answer 5

okay thats fine :D so what do you know about substitution? do you know where to start?

Answer 6

I have no idea

Answer 7

okay thats alright :) so ill do number 1 so just fallow along, okay?

Answer 8

ok

Answer 9

Could you help me with them all please though?

Answer 10

yes i will :) that was the plan all along haha

Answer 11

okay so we start with:

6x+2y=0
4x+y=-1

so the first step is to convert one to slope-intercept form (y=mx+b)

Answer 12

Okay

Answer 13

alright so chose one to convert...

Answer 14

6x=2y=0
so would it be y=6x+2=0?

Answer 15

close :) it would be y=-3x but you got the right idea

Answer 16

okay lets do the other one its simpler, so we star with:

6x+2y=0
4x+y=-1

we convert the second equation:

4x+y=-1

subtract 4x

y=-4x-1

correct?

Answer 17

@sbuck98

Answer 18

Okay yes, sorry my laptop died.

Answer 19

its alright haha okay so we plug our new equation in for y into the other equation, so we get:

6x+2(-4x-1)

can you simplify?

Answer 20

6x=2*(4x+1)

Answer 21

no you see we need to find the values of x and y so we:

6x+2(-4x-1)

distribute the 2:



6x-8x-2

combine like terms:

-2x-2

add 2 to both sides:

-2x=2

divide by -2:

x=-1

do you follow?