Question

solve the following pair of equation:
2x+y=7
3x+2y=12​

Answer 1

Step-by-step explanation:

Use them as simultaneous equations:

3x + 2y = 12 (equation 1)

2x + y = 7 (equation 2)

There are several ways you can calculate this. Below is only one of them:

Double everything in equation 2 to give 4x + 2y = 14

Subtract equation 1 from new equation 2 to give:

x = 2 (the y’s cancel each other)

Now use the value x = 2 to solve the original equations:

6 + 2y = 12 and

4 + y = 7

You will see that y = 3in both equations.

So the solution is: x=2. y=3