Question

When you substitute a value for x or y, you are x or y with a value.

Answer 1

Step-by-step explanation:

See whenever we have two variables like x and y.

And also we have given two equations in terms of x and y.

Example: ax + by = p  and cx + dy = q

In order to get the solution, we need to find the value of x and y using the given two equations.

So here what we can do is:

Consider any one equation and get x or y from that equation.

i.e consider ax + by = p  or x = $\frac{1}{a}*(p-by)$

Now plug value of x (or y) from the equation you have considered into the another equation.

i.e c($\frac{1}{a}*(p-by)$)+dy = q

Now solve this equation to get y (or x).

and after that we can find the other variable.

Answer 2

Answer:

When you substitute a value for x or y, you are  

✔ temporarily replacing

x or y with a value.

Step-by-step explanation: