Question

Y=2-3x 5x+4y=-6 СРОЧНО !!!!

Answer 1

Y=2-3x (1)
5x+4y=-6 (2)
y из (1) уравнения подставим на 2 и получим:
2-3x
5x+4(2-3x)=-6
5x+8-12x=-6
-7x=-8-6
x=14/7
x=2   Число 2 вставим на 1 уравнение найдем y=>
y=2-3*2=-4
Ответ x=2  y=-4

Answer 2

To solve the system of equations:

Y = 2 - 3x (Equation 1) 5x + 4y = -6 (Equation 2)

We can use substitution or elimination method.

Substitution Method:

We can solve equation 1 for y, and then substitute the expression for y in equation 2, to get an equation in x that we can solve:

Y = 2 - 3x (Equation 1) y = 2 - 3x (since Y = y) 5x + 4(2 - 3x) = -6 (substituting y in Equation 2) 5x + 8 - 12x = -6 -7x = -14 x = 2

Now we can substitute the value of x in equation 1 to find the value of y:

y = 2 - 3(2) y = -4

Therefore, the solution of the system of equations is (x, y) = (2, -4).

Elimination Method:

We can eliminate one variable by adding or subtracting the two equations. In this case, if we multiply equation 1 by 4, we can eliminate y by adding the resulting equation to equation 2:

4y = 8 - 12x (multiplying Equation 1 by 4) 5x + 4y = -6 (Equation 2)

-7x = -14 x = 2

Now we can substitute the value of x in equation 1 to find the value of y:

y = 2 - 3(2) y = -4

Therefore, the solution of the system of equations is (x, y) = (2, -4).