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Find the solution of the system of equations.

{:[6x-y=-30],[-3x+6y=-18]:}

Find the solution of the system of equations.\newline6xy=303x+6y=18 \begin{array}{r} 6 x-y=-30 \\ -3 x+6 y=-18 \end{array}

Full solution

Q. Find the solution of the system of equations.\newline6xy=303x+6y=18 \begin{array}{r} 6 x-y=-30 \\ -3 x+6 y=-18 \end{array}
  1. Write Equations: Write down the system of equations to be solved.\newlineWe have the following system of equations:\newline6xy=306x - y = -30\newline3x+6y=18-3x + 6y = -18
  2. Multiply First Equation: Multiply the first equation by 66 to prepare for elimination.\newlineMultiplying the first equation by 66 gives us:\newline(6xy)×6=30×6(6x - y) \times 6 = -30 \times 6\newlineWhich simplifies to:\newline36x6y=18036x - 6y = -180
  3. Add Equations: Add the modified first equation to the second equation to eliminate yy.\newlineAdding the equations (36x6y)+(3x+6y)(36x - 6y) + (-3x + 6y) gives us:\newline(36x6y)+(3x+6y)=180+(18)(36x - 6y) + (-3x + 6y) = -180 + (-18)\newlineWhich simplifies to:\newline33x=19833x = -198
  4. Solve for x: Solve for x.\newlineDividing both sides of the equation by 3333 gives us:\newlinex=198/33x = -198 / 33\newlineWhich simplifies to:\newlinex=6x = -6
  5. Substitute and Solve for y: Substitute the value of xx back into one of the original equations to solve for yy. Using the first equation 6xy=306x - y = -30, we substitute x=6x = -6: 6(6)y=306(-6) - y = -30 Which simplifies to: 36y=30-36 - y = -30
  6. Final Solution: Solve for yy.\newlineAdding 3636 to both sides of the equation gives us:\newline36+36y=30+36-36 + 36 - y = -30 + 36\newlineWhich simplifies to:\newliney=6-y = 6\newlineMultiplying both sides by 1-1 gives us:\newliney=6y = -6