You first subtract 5x from both sides and end up with -3y=21-5x. In order to isolate the variable you need to divide -3 from both sides. Your equation would then be y= -7+ 5/3x. I hope this helps love! :)
Answer:
The answer to your question is There is no solution, the lines are parallel.
Step-by-step explanation:
Data
Equation 1 x + y = 2
Equation 2 x + y = -1
Solve for y
Equation 1 y = -x +2
y = - x + 2
Equation 2 y = - x - 1
See the graph below
These lines do not cross, so there is no solution. They are parallel.
If the lines have crossed, there would be a solution.
No solution bc the equations aren't equal to each other