Q. Find the solution of the system of equations.6x−y=−30−3x+6y=−18
Write Equations: Write down the system of equations to be solved.We have the following system of equations:6x−y=−30−3x+6y=−18
Multiply First Equation: Multiply the first equation by 6 to prepare for elimination.Multiplying the first equation by 6 gives us:(6x−y)×6=−30×6Which simplifies to:36x−6y=−180
Add Equations: Add the modified first equation to the second equation to eliminate y.Adding the equations (36x−6y)+(−3x+6y) gives us:(36x−6y)+(−3x+6y)=−180+(−18)Which simplifies to:33x=−198
Solve for x: Solve for x.Dividing both sides of the equation by 33 gives us:x=−198/33Which simplifies to:x=−6
Substitute and Solve for y: Substitute the value of x back into one of the original equations to solve for y. Using the first equation 6x−y=−30, we substitute x=−6: 6(−6)−y=−30 Which simplifies to: −36−y=−30
Final Solution: Solve for y.Adding 36 to both sides of the equation gives us:−36+36−y=−30+36Which simplifies to:−y=6Multiplying both sides by −1 gives us:y=−6