Both of the equations have common factors that can be factored out simplifying them.
4x − 10y = 4 --------> divide both sides by 2
−6x + 15y = −6 --------> divide both sides by -3
After taking out the common factors, the equations become:
2x - 5y = 2
2x - 5y = 2
They are both the same equation, so the solution is all real solutions of the equation.
Answer: d. all real solutions
