Question

3=-m+b -2=2m+b
find m and b

Answer 1

b = 4/3

m = -5/3

Explanation:

3=-m+b

-2=2m+b

Subtract the second equation from the first

3=-m+b

-( -2=2m+b)

------------------------

3=-m+b

+ 2=-2m-b

------------------------

5= -3m +0b

Divide by -3

5/-3 = -3m/-3

-5/3 = m

Now we can find b

3=-m+b

3 = - (-5/3) +b

3 = 5/3 +b

Subtract 5/3 from each side

3 -5/3 = b

9/3 - 5/3 = b

4/3 =b