Q. Find the solution of the system of equations.−3x−9y6x+7y=−30=−6Submit Answer
Write Equations: Write down the system of equations to be solved.We have the following system of equations:−3x−9y=−306x+7y=−6We need to find the values of x and y that satisfy both equations simultaneously.
Simplify Equations: Attempt to simplify the equations if possible.Looking at the first equation, we can divide every term by −3 to simplify it:(−3x/−3)−(9y/−3)=(−30/−3)This simplifies to:x+3y=10Now we have a simpler system of equations:x+3y=106x+7y=−6
Elimination Method: Use the method of elimination to solve the system of equations.To eliminate one of the variables, we can multiply the first equation by 6 so that the coefficient of x in both equations is the same:6(x+3y)=6(10)This gives us:6x+18y=60Now we have:6x+18y=606x+7y=−6
Subtract Equations: Subtract the second equation from the first to eliminate x.(6x+18y)−(6x+7y)=60−(−6)This simplifies to:6x+18y−6x−7y=60+6Which further simplifies to:11y=66
Solve for y: Solve for y.Divide both sides of the equation by 11 to find the value of y:1111y=1166This gives us:y=6
Substitute and Solve: Substitute the value of y back into one of the original equations to solve for x. We can use the simplified version of the first equation, x+3y=10: x+3(6)=10 This simplifies to: x+18=10
Final Solution: Solve for x.Subtract 18 from both sides of the equation:x+18−18=10−18This gives us:x=−8