Question

Solve this system of equations by using substitution.

3x + y = 1
y = x + 5

Answer 1

replace \(y\) in the first equation by \(x+5\) and solve
\[3x+x+5=1\] for \(x\)

Answer 2

it has to be two points like this (___,___)

Answer 3

It will be once you solve it, 3x + x + 5 = 1, solve for x

Answer 4

i dont know how to do it

Answer 5

3x + x = ?

Answer 6

4x

Answer 7

4x + 5 = 1

Subtract 5 from both sides, whats that?

Answer 8

4x=-4

Answer 9

Do you know how to isolate x?

Answer 10

um like devide both sides

Answer 11

Yes,

4x = -4
/4 /4

x = ?

Answer 12

x=-1

Answer 13

so i know (-1,___)

Answer 14

Now plug in -1 for x and solve for y,

y = -1 + 5

Answer 15

Solved? I have to leave right now.

Answer 16

k ty

Answer 17

yw, you're suppose to get (-1,4)

3(-1) + 4 = 1

-3 + 4 = 1

1 = 1 <-- therefore this works

Answer 18

yes i got that

Answer 19

Ok. Bye.