Q. Find the solution of the system of equations.−4x−8y8x+3y=−20=1
Elimination Method: Let's start by solving the system of equations using the method of elimination or substitution. We will use elimination in this case. First, we need to make the coefficients of one of the variables the same in both equations so we can eliminate that variable. We can multiply the second equation by 4 to match the coefficient of x in the first equation.Calculation: (8x+3y=1)×4New system of equations:−4x−8y=−2032x+12y=4
Adding Equations: Now, we add the two equations together to eliminate x.Calculation: (−4x−8y)+(32x+12y)=−20+4New equation: 28y=−16
Solving for y: Next, we solve for y by dividing both sides of the equation by 28.Calculation: 2828y=28−16y = −2816y = −74
Substitute Back: Now that we have the value of y, we can substitute it back into one of the original equations to find x. We'll use the first equation for this purpose.Substitution: −4x−8(−74)=−20Calculation: −4x+732=−20
Clearing Denominators: To solve for x, we first need to get rid of the fraction by multiplying every term by 7 to clear the denominators.Calculation: 7(−4x)+7(732)=7(−20)−28x+32=−140
Move 32: Next, we move 32 to the other side of the equation by subtracting it from both sides.Calculation: −28x=−140−32−28x=−172
Final Solution: Finally, we solve for x by dividing both sides of the equation by −28. Calculation: x=−172/−28 x=172/28 x=43/7