Question

(5x – 2у) = 15, 2x - y = 7.

Answer 1

Ответ:

x = 1

y = -5

Пошаговое объяснение:

5x - 2y = 15

2x - y = 7

y = 2x - 7

5x - 2( 2x - 7) = 15

5x - 4x + 14 = 15

x = 1

y = -5

Answer 2

It looks like you've provided a system of two linear equations with two variables, x and y:

1. $5x - 2y = 15$
2. $2x - y = 7$

To solve this system of equations, we can use various methods such as substitution, elimination, or graphing. Let's solve it using the substitution method:

From equation (2), we can isolate y: $y = 2x - 7$

Now substitute the value of y into equation (1): $5x - 2(2x - 7) = 15$

Simplify the equation: $5x - 4x + 14 = 15$ $x + 14 = 15$

Subtract 14 from both sides: $x = 1$

Now that we have the value of x, we can substitute it back into equation (2) to find y: $2(1) - y = 7$

Simplify: $2 - y = 7$

Subtract 2 from both sides: $-y = 5$

Multiply by -1 to solve for y: $y = -5$

So, the solution to the system of equations is $x = 1$ and $y = -5$.