SOLUTION: System of two equations in two unknown find the solution to the systems: 3y=-+1 3x+y=5 Can you please show step-by-step, how to get started

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Question 149175: System of two equations in two unknown

find the solution to the systems:
3y=-+1
3x+y=5

Can you please show step-by-step, how to get started
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
First, you have to know the rule that the number of unknowns
(x,y,z,etc.) has to match the number of equations, and in
your problem, it does (2 equations and 2 unknowns), so this
system is solvable
Is the first equation y+=+-1? If so,
just substitute this value in the 2nd equation
3x+%2B+y+=+5
3x+%2B%28-1%29+=+5
3x+-+1+=+5
add 1 to both sides
3x+=+6
Divide both sides by 3
x+=+2
The solutions are y = -1 and x = 2