Solve by substitution;
4x-12y=5
-x+3y
You have no equal sign on the second line ---> typo
Your second line is not a complete equation.
-x + 3y = ???
Unless you provide a complete pair of equations, there is no solution.
Your second equation, when complete, will tell you what to substitute for x in the first equation.
To solve the system of equations by substitution, we need to solve one of the equations for one variable in terms of the other variable and then substitute it into the other equation.
Let's solve the second equation for x in terms of y:
-x + 3y = 0
-x = -3y
x = 3y
Now we substitute this expression for x in the first equation:
4(3y) - 12y = 5
12y - 12y = 5
0 = 5
As the equation simplifies to 0 = 5, we have a contradiction. This means that the system of equations has no solution. The two lines represented by the equations are parallel and will never intersect.