Question

2х – у = 1, х + у = 2?

Answer 1

Ответ:

если правильно понял:

2х-у=1

х+у=2

2x-y=1

x=2-y

2(2-y)-y=1

x=2-y

4-2y-y=1

x=2-y

-3y=-3 |:(-3)

x=2-y

y=1

x=2-1

y=1

x=1

Answer 2

It looks like you've provided a system of linear equations:

1. $2x - y = 1$
2. $x + y = 2$

You can solve this system of equations using various methods. One common approach is to use the method of substitution or elimination.

Let's use the method of elimination here:

Start with the two equations:

1. $2x - y = 1$
2. $x + y = 2$

Add the two equations together to eliminate the $y$ variable:

$(2x - y) + (x + y) = 1 + 2$

This simplifies to:

$3x = 3$

Now, divide both sides by 3:

$x = 1$

Now that we know the value of $x$, we can substitute it back into the second equation to solve for $y$:

$x + y = 2$

$1 + y = 2$

Subtract 1 from both sides:

$y = 1$

So, the solution to the system of equations is $x = 1$ and $y = 1$.