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)?

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)?

mathmale · Answer

There are several different methods applicable here.  You could use substitution, elimination by addition / subtraction, graphing.    Which of these methods is most familiar to you?  Try applying it to the problem at hand.

mhchen · Answer

since a=b-2
plug that into the first equation:

(b-2) - 3b = 4
b-3b = 6
-2b = 6
b = -3

Then plug b into any equation:
a = b - 2
a = (-3) - 2
a = -5

mathmale · Answer

mhchen is proposing that y ou use the method of substitution to solve this system of linear equations.  Can you do that?