Question

2.3y-x--17 15 х+4+3у=-5​

Answer 1

Ответ:

179283+1907618!92928372901

Answer 2

It seems like you have a system of linear equations:

1. 2.3y - x = 17
2. x + 4 + 3y = -5

You can solve this system of equations by using the method of substitution or elimination. I'll demonstrate the elimination method here:

First, let's eliminate one of the variables. Let's eliminate x. You can do this by multiplying the second equation by 2.3 (the coefficient of x in the first equation) to make the coefficients of x in both equations equal:

1. 2.3y - x = 17
2. 2.3(x + 4 + 3y) = 2.3(-5)

Now, simplify the second equation:

1. 2.3y - x = 17
2. 2.3x + 9y + 9.2 = -11.5

Now, we have a system of equations with equal coefficients for x:

1. 2.3y - x = 17
2. 2.3x + 9y = -20.7

Next, let's solve one of the equations for one of the variables. I'll solve the second equation for x:

2.3x = -20.7 - 9y

Now, divide both sides by 2.3 to isolate x:

x = (-20.7 - 9y) / 2.3

Now, substitute this expression for x into the first equation:

2.3y - (-20.7 - 9y) / 2.3 = 17

Now, solve for y:

2.3y + (20.7 + 9y) / 2.3 = 17

Multiply both sides by 2.3 to get rid of the fraction:

2.3(2.3y) + 20.7 + 9y = 17 * 2.3

5.29y + 20.7 + 9y = 39.1

Combine like terms:

14.29y + 20.7 = 39.1

Now, subtract 20.7 from both sides:

14.29y = 39.1 - 20.7

14.29y = 18.4

Now, divide by 14.29 to solve for y:

y = 18.4 / 14.29 ≈ 1.29

Now that you have found the value of y, you can substitute it back into one of the original equations to solve for x. Let's use the first equation:

2.3y - x = 17

2.3(1.29) - x = 17

2.97 - x = 17

Now, subtract 2.97 from both sides to solve for x:

-x = 17 - 2.97

-x = 14.03

Now, multiply both sides by -1 to isolate x:

x = -14.03

So, the solution to the system of equations is:

x ≈ -14.03 y ≈ 1.29