Question

ss

Answer 1

well i did 3x+y=5

Answer 2

No no no

Have you learned the elimination, substitution or graphing method?

Answer 3

Well I suck at math, and I have this confused with something else.

Answer 4

well i did like 2 years ago

Answer 5

Let's use the substitution method since it'll be easier

3x + 3y = 15

can you solve the equation for x

Answer 6

take the 3y to the other side and then divide both sides by 3

Answer 7

yeah hold on-

Answer 8

x=-y+5
y=-x+5

Answer 9

Good! So now what we want to do is substitute that into the other equation

so we said x = -y + 5

that means in place of x in the other equation, we can replace it with (-y+5) because x equals -y+5 and so you can substitute it in
hence, why it's called the substitution method

so we get
12x + 8y = 20

12(-y+5) + 8y = 20

can you distribute the 12 and solve for y?

Answer 10

yes hold on-

Answer 11

-12y+60+8y=20

Answer 12

Good! Now solve for y

add the like terms

so -12y + 8y = ??

Answer 13

-4y

Answer 14

good

so

-4y + 60 = 20

what is y =

Answer 15

y=10

Answer 16

Wonderful! Now that we know what y is, we can solve for x

Remember the first equation they gave us?

3x + 3y = 15

plug in y = 10 and solve for x

Answer 17

It doesn't matter which equation you plug it into. You could even plug it into the second equation, but the first equation has smaller numbers. Both would give you the same number for x

Answer 18

x=-5?

Answer 19

You got it!!

Answer 20

ok so (-5,10)

Answer 21

and your answer would be in the form of (x, y)

so x is -5 and y is 10

Answer 22

Bingo!! Well done!

Answer 23

Yay thank you so much!

Answer 24

You're most welcome!

Answer 25

u should run for ambassador or mod. I think u would be good at it : D