How do you solve the system #3x-y=4# and #2x-3y=-9# using substitution?
See the entire solution process below:
Step 1) Solve the first equation for
Step 2) Substitute
Step 3) Substitute
The solution is:
The shared point of these two equations is
As we have just used equation(1) we now need to use equation(2)
Subtract 12 from both sides
Divide both sides by -7
I chose equation 1 as it is the most strait forward one to use.
Substitute for x in equation 1 giving: