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 system:6x−y=−30−3x+6y=−18We will use the method of substitution or elimination to solve this system.
Choose Method: Decide on a method to solve the system.We can use the elimination method by multiplying the second equation by 2 to make the coefficients of x the same in both equations.
Multiply Second Equation: Multiply the second equation by 2. 2(−3x+6y)=2(−18)This gives us:−6x+12y=−36Now we have the system:6x−y=−30−6x+12y=−36
Add Equations: Add the two equations together to eliminate x.(6x−y)+(−6x+12y)=−30+(−36)This simplifies to:11y=−66
Solve for y: Solve for y.Divide both sides by 11 to find the value of y.y=−66/11y=−6
Substitute for x: Substitute the value of y into one of the original equations to solve for x. We can use the first equation: 6x−y=−30 Substitute y=−6: 6x−(−6)=−306x+6=−30
Solve for x: Solve for x.Subtract 6 from both sides to isolate x:6x=−30−66x=−36Divide both sides by 6:x=−36/6x=−6