Q. Solve the system of equations.{4x−y=116x−2y=13
Write Equations: Write down the system of equations to be solved.We have the following system of equations:4x−y=11 ...(1)6x−2y=13 ...(2)We will solve this system using the method of substitution or elimination.
Eliminate Variable: Look for a way to eliminate one of the variables.Notice that if we multiply equation (1) by 2, we get:2×(4x−y)=2×118x−2y=22 ...(3)Now we have the coefficients of y in equations (2) and (3) as equal but opposite in sign, which means we can add the equations to eliminate y.
Add Equations: Add equations (2) and (3) to eliminate y. (6x−2y)+(8x−2y)=13+22 6x+8x−2y−2y=35 14x=35
Solve for x: Solve for x.Divide both sides of the equation by 14 to find the value of x.1414x=1435x=1435x=2.5
Substitute x: Substitute the value of x back into one of the original equations to find y. We can use equation (1) for this purpose. 4x−y=114∗(2.5)−y=1110−y=11
Solve for y: Solve for y.Subtract 10 from both sides of the equation to isolate y.−y=11−10−y=1Multiply both sides by −1 to get the value of y.y=−1