Question

Two equations are given below:

a − 3b = 4
a = b − 2

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

(−2, −2)
(−3, −1)
(−9, −7)
(−5, −3)

Answer 1

@Sachintha

Answer 2

@pooja195

Answer 3

@happyrosy

Answer 4

do you know substitution method?

Answer 5

no

Answer 6

you already have a= b-2
Substitute that for a

Answer 7

a -3b = 4 --> b - 2 -3b = 4

Answer 8

-2b - 2 = 4
-2b = 6
b = -3

Answer 9

okay so is it B

Answer 10

Substitute b in any of your 2 original equations

Answer 11

No it isn't b. Remember it is in the form of (a, b)---> (a, -3)

Answer 12

Answer is D i believe

Answer 13

THANKS! @claringleek

Answer 14

:)

Answer 15

a − 3b = 4
a = b − 2

We are going to have to substitute -3 for b. Let's choose the second equation because it is shorter.
a = -3 - 2, which means a = -5
So, ( -5, -3) is your answer which is D