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Find the solution of the system of equations.

{:[4x+y=-43],[2x-8y=4]:}

Find the solution of the system of equations.\newline4x+yamp;=432x8yamp;=4 \begin{aligned} 4 x+y & =-43 \\ 2 x-8 y & =4 \end{aligned}

Full solution

Q. Find the solution of the system of equations.\newline4x+y=432x8y=4 \begin{aligned} 4 x+y & =-43 \\ 2 x-8 y & =4 \end{aligned}
  1. Write Equations: Write down the system of equations to be solved.\newlineWe have the following system of equations:\newline4x+y=434x + y = -43\newline2x8y=42x - 8y = 4
  2. Multiply to Eliminate y: Multiply the first equation by 88 to eliminate yy.\newlineMultiplying the first equation by 88 gives us:\newline8(4x+y)=8(43)8(4x + y) = 8(-43)\newline32x+8y=34432x + 8y = -344
  3. Add Equations: Add the modified first equation to the second equation to eliminate yy. We now have: 32x+8y=34432x + 8y = -344 2x8y=42x - 8y = 4 Adding these two equations together gives us: (32x+2x)+(8y8y)=344+4(32x + 2x) + (8y - 8y) = -344 + 4 34x=34034x = -340
  4. Solve for x: Solve for x.\newlineDivide both sides of the equation by 3434 to find xx:\newline34x34=34034\frac{34x}{34} = \frac{-340}{34}\newlinex=10x = -10
  5. Substitute xx for yy: Substitute xx back into one of the original equations to solve for yy. Using the first equation 4x+y=434x + y = -43, we substitute x=10x = -10: 4(10)+y=434(-10) + y = -43 40+y=43-40 + y = -43
  6. Solve for y: Solve for y.\newlineAdd 4040 to both sides of the equation to isolate yy:\newline40+y+40=43+40-40 + y + 40 = -43 + 40\newliney=3y = -3