Respuesta :

Allysia123
x+2y = 9 ---------eq.1
x-y =6 ----------- eq.2

x = 9 -2y (from eq. 1)

Now substitute the value of x in the second eq.2

9-2y-y =6
-3y = -3
y =1

So,
x +2 (1)= 9
x= 7


MrRoyal

The expression that can be substituted for x in the second equation is 9 - 2y

The system of equations is given as:

x + 2y = 9 and x - y = 6

To make x the subject of formula in the first equation, we simply substitute 2y from both sides of the equation.

So, we have:

x = 9 - 2y

Hence, the expression that can be substituted for x in the second equation is 9 - 2y

Read more about system of equations at:

https://brainly.com/question/14323743

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