Question

a − 3b = 9
a = b − 3

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

Answer 1

Is this slope intercept?

Answer 2

or what are you looking for exactly?

Answer 3

coordinates

Answer 4

do you think you know the answer

Answer 5

a=9+3b
a=b-3

Answer 6

a - 3b = 9
a = b - 3

so sub in b - 3 in for a in the 1st equation
(b - 3) - 3b = 9 -- combine like terms
-2b - 3 = 9 --- add 3 to both sides
-2b = 9 + 3
-2b = 12
b = 12/-2
b = -6

a = b - 3
a = -6 - 3
a = -9

check..
a - 3b = 9
-9 - 3(-6) = 9
-9 + 18 = 9
9 = 9 (correct)

so a = -9 and b = -6

Answer 7

substitute 1st eqn into 2nd eqn

Answer 8

the choices are
(−9, −6)
(−4, −3)
(−6, −3)
(−9, −7)

Answer 9

(-9,-6)

Answer 10

how did you get that

Answer 11

I did the entire problem up above ^^. Check it out and see if you have any questions ?

Answer 12

Basically, your dealing with a substitution problem

Answer 13

still dont understand

Answer 14

y = x + 14
y = 3x + 2

Answer 15

y = x + 14
y = 3x + 2

2 ways to do this..

(1) y = x + 14...so sub in x + 14 in for y in the other equation
x + 14 = 3x + 2
x - 3x = 2 - 14
-2x = - 12
x = 6

y = x + 14
y = 6 + 14
y = 20

OR
(2) y = 3x + 2....so sub in 3x + 2 in for y in the other equation
3x + 2 = x + 14
3x - x = 14 - 2
2x = 12
x = 6

y = 3x + 2
y = 3(6) + 2
y = 18 + 2
y = 20

either way you do it, the answers are the same...x = 6 and y = 20 or (6,20)

Answer 16

sorry but I have to go now...kinda lost track of time. I might be back on later...