Question

5х+у = -2- 5 x + 3y = -640 баллов ​

Answer 1

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Answer 2

Ответ:

5x+y=-2,y=-2-5,y=-5x-2.-5x+3y=-6,-5x+3y+6=0,5x-3y-6=0

Answer 3

To solve the system of equations:

5x + y = -2 ...(1) -5x + 3y = -640 ...(2)

We can use the method of substitution or elimination. Let's use the method of elimination:

Multiplying equation (1) by 3, we get: 15x + 3y = -6 ...(3)

Now, add equations (2) and (3) to eliminate the variable 'x': (-5x + 3y) + (15x + 3y) = -640 + (-6) 10x + 6y = -646 ...(4)

Divide equation (4) by 2: 5x + 3y = -323 ...(5)

Now, we have the system of equations: 5x + 3y = -323 ...(5) -5x + 3y = -640 ...(2)

Add equations (5) and (2) to eliminate the variable 'x': (5x + 3y) + (-5x + 3y) = -323 + (-640) 6y = -963

Divide both sides of the equation by 6: y = -963 / 6 y = -160.5

Substitute the value of y back into equation (1): 5x + (-160.5) = -2 5x - 160.5 = -2 5x = 158.5 x = 158.5 / 5 x = 31.7

Therefore, the solution to the system of equations is x = 31.7 and y = -160.5.