SOLUTION: Solve the system by substitution. x + y = 12 y = 2x

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 Click here to see ALL problems on Linear-systems Question 60858: Solve the system by substitution. x + y = 12 y = 2xAnswer by jai_kos(139)   (Show Source): You can put this solution on YOUR website!Given the equation, we get x + y = 12,y = 2x We shall break up the equation into two parts , we get x + y = 12 --------(1) y = 2x -------(2) Now substitute equation(2) in equation(1), we get x + 2x = 12 3x = 12 Divide by 3 on both sides, we get x = 4. Now substitute the value of “x” in equation(2), we get x = 2 * 4 = 8 Hence the value of “x” = 4 and the value of “y” = 8