If 4x+5y=10 and x+3y = 8 then (5x+8y)/3=
First set up a system of equations and solve. 4x+y=10 x+3y=8 In order to have one variable cancel out, I will multiply the top by -3. -12x-3y=-30 x+3y=8 ____________ -11x=-22 x=2 Then plug the x value into one of the original equations. (2)+3y=8 3y=6 y=2 Now plug both into the final equation: 5(2)+8(2)/3 (10+16)/3 26/3 8.667 is the answer or 26/3.