Question

X+Y=9 , 2X+Y=14 by substitution method

Answer 1

Value of x = 5

Value of y = 4

Step-by-step explanation:

We are given with the two equations;

x + y = 9   and    $2x$ + y = 14

Substitution method says that taking out the value of one variable from one equation and putting that into another equation;

• First equation is;

                            x + y = 9

                             y = 9 - x    --------------- [Equation 1]

• Second equation is;

                            $2x$ + y = 14

                            $2x$ + 9 - x = 14          {using equation 1}

                            x + 9 = 14

                            x = 14 - 9

                            x = 5

Now, putting the value of x in equation 1, we get;

                              y = 9 - x

                              y = 9 - 5 = 4

Therefore, x = 5 and y = 4.

Answer 2

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