Question

3x - 2y =5,x + 2y = 7;​

Answer 1

Ответ:

х=7+2у

3(7+2у) +2у=5

21+6у+2у=5

8у=-16

у=-2

подставляем в х=7+2у

х=7+2(-2)=3

ответ х=3, у= - 2

Объяснение:

Answer 2

You have a system of two linear equations with two variables:

1. 3x - 2y = 5
2. x + 2y = 7

To solve this system, you can use the method of substitution or elimination. Let's use the elimination method to solve it:

First, add both equations together to eliminate the y variable:

(3x - 2y) + (x + 2y) = 5 + 7

This simplifies to:

4x = 12

Now, divide both sides by 4 to isolate x:

4x/4 = 12/4

x = 3

Now that you've found the value of x, you can substitute it back into one of the original equations to find the value of y. Let's use equation (2):

x + 2y = 7 3 + 2y = 7

Subtract 3 from both sides:

2y = 7 - 3 2y = 4

Now, divide both sides by 2 to isolate y:

2y/2 = 4/2 y = 2

So, the solution to the system of equations is:

x = 3 y = 2

The values of x and y that satisfy both equations are x = 3 and y = 2.