Question

Решением какого уравнения с двумя переменными есть ответ (-1;2) 2х-2у=-2 3х+4у=7 5х+2у=4

Answer 1

Ответ:

Уравнения удовлетворяющего условию в списке нет

Объяснение:

2х(-1)-2х2=-2-4=-6

3х(-1)+4х2=-3+8=5

5×(-1)+2×2=-5+4=-1

Answer 2

To find the equation with two variables that has the solution (-1, 2), we can substitute these values into each of the given equations and see which one satisfies both the left and right sides of the equation.

Let's check each equation:

1. 2x - 2y = -2 Substitute x = -1 and y = 2: 2(-1) - 2(2) = -2 -2 - 4 = -6 (not equal to -2)

2. 3x + 4y = 7 Substitute x = -1 and y = 2: 3(-1) + 4(2) = 7 -3 + 8 = 5 (not equal to 7)

3. 5x + 2y = 4 Substitute x = -1 and y = 2: 5(-1) + 2(2) = 4 -5 + 4 = -1 (not equal to 4)

As we can see, none of the given equations satisfy the solution (-1, 2). This means that there is no equation among the three given equations with the solution (-1, 2).