Question

(5x - 2y = 393x + y = 30​

Answer 1

Ответ:

5х-2у=39

5х-2у-39=39-39

5х-2у-39=0

3х+у=30

3х+у-30=30-30

3х+у=0

Пошаговое объяснение:

Answer 2

It looks like you have a system of linear equations with two variables, x and y. The system is as follows:

1. $5x - 2y = 39$
2. $3x + y = 30$

To solve for the values of x and y that satisfy both equations, you can use various methods, such as substitution or elimination. Let's solve it using the elimination method:

Step 1: Multiply the second equation by 2 to make the coefficients of y in both equations the same:

$2 \cdot (3x + y) = 2 \cdot 30$ $6x + 2y = 60$

Step 2: Add the modified second equation to the first equation to eliminate the y terms:

$(5x - 2y) + (6x + 2y) = 39 + 60$ $11x = 99$ $x = \frac{99}{11}$ $x = 9$

Step 3: Substitute the value of x back into the second equation to solve for y:

$3x + y = 30$ $3 \cdot 9 + y = 30$ $27 + y = 30$ $y = 30 - 27$ $y = 3$

So, the solution to the system of equations is $x = 9$ and $y = 3$.