Question

5х-(х+у)+15=3 3х-2(х+у)=3

Answer 1

Как то так,надеюсь все цифры понятны)

Answer 2

To solve the system of equations:

1. 5x - (x + y) + 15 = 3
2. 3x - 2(x + y) = 3

Let's simplify and find the values of x and y.

Step 1: Simplify the equations.

1. 5x - x - y + 15 = 3 Combine the x terms: 4x - y + 15 = 3

2. 3x - 2x - 2y = 3 Combine the x terms: x - 2y = 3

Step 2: Now, we have a system of two equations:

1. 4x - y + 15 = 3
2. x - 2y = 3

Step 3: We can use either the substitution or elimination method to solve the system. Let's use the elimination method.

Step 4: Multiply the second equation by 4 to make the coefficients of x in both equations the same:

4(x - 2y) = 4(3) 4x - 8y = 12

Step 5: Now, we have the following system:

1. 4x - y + 15 = 3
2. 4x - 8y = 12

Step 6: Subtract equation 1 from equation 2 to eliminate the x terms:

(4x - 8y) - (4x - y + 15) = 12 - 3 4x - 8y - 4x + y - 15 = 9 -7y - 15 = 9

Step 7: Solve for y:

-7y = 9 + 15 -7y = 24 y = -24 / -7 y = 24/7 or approximately 3.43

Step 8: Substitute the value of y back into one of the equations to find x. Let's use equation 1:

4x - y + 15 = 3 4x - 3.43 + 15 = 3 4x + 11.57 = 3 4x = 3 - 11.57 4x = -8.57 x = -8.57 / 4 x = -2.14

So, the solution to the system of equations is x = -2.14 and y = 24/7 (or approximately 3.43).