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The first equation is ambiguous!
Let's assume that it is the first case.
You can solve questions like this by graphing or algebraically.
Let's look at the graphic solution:
The red line is
The green line is
This is the 2nd equation written in terms of y.
Now solve algebraically by substitution:
Substitute this equation for y in the second equation.
Simplify and solve for x.
Multiply both sides by the multiplicative inverse of 4/3 (that's 3/4)
Now substitute this value of x into either one of the two original equations and solve for y. Take the first equation,
There is only one solution, it is: (-3, -2) Compare this with the intersection point of the two lines on the graph.
Now assume that the first equation is:
and let's look at the graph:
As you can see, there would be two solutions (points of intersection) in this case.