Question

a − 3b = 4
a = b − 2

What is the solution to the set of equations in the form (a, b)?

Answer 1

(−2, −2)
(−3, −1)
(−9, −7)
(−5, −3)

Answer 2

Use the substituion method
plug in equation 2 into equation one
\[\huge~\rm~ b-2 − 3b = 4\]

Answer 3

Now solve for b

Answer 4

wait how do I solve for b

Answer 5

Start by combining like terms

Answer 6

b−2−3b=4
-3+1=?

Answer 7

-2

Answer 8

Good now we have -2b now we add 2 to both sides 4+2=?

Answer 9

6

Answer 10

So now we have -2b=6
Whats 6/-2 ?

Answer 11

8

Answer 12

?

Answer 13

no wait u divide those right?

Answer 14

Yes

Answer 15

/=divide

Answer 16

so than it would be -3

Answer 17

Yes now we plug -3 in place of b in equation 2
a=-3-2
-3-2=?

Answer 18

-5

Answer 19

good so we have b=-3 a=-5 whats the answer?

Answer 20

it would be D

Answer 21

Good job! :D

Answer 22

thx for the help i'll fan and metal now ^_^

Answer 23

thanks ^.^