Question

1.-3х -7у-5х+3у= 2.7(2х-у)-4(3х-2у)= 3.8х-2(3х+5у)=. 4.-(8х+4у)-6у=

Answer 1

Ответ:

Пошаговое объяснение:

1.-3х -7у-5х+3у=-8х-4у

2.7(2х-у)-4(3х-2у)= 14х-7у-12х+8у=2х+у

3.8х-2(3х+5у)=.8х-6х-10у=2х-10у

4.-(8х+4у)-6у=-8х-4у-6у=-8х-10у

Answer 2

It looks like you've provided a set of equations, and it seems you want to solve this system of equations for the variables x and y. Let's go through each equation step by step.

1. -3x - 7y - 5x + 3y = 2.7(2x - y) - 4(3x - 2y) Simplify both sides: -8x - 4y = 5.4x - 2.7y - 12x + 8y

Combine like terms: -8x - 4y = -6.6x + 5.3y

Now, let's solve for y in terms of x: -4y + 5.3y = -8x + 6.6x 1.3y = -1.4x y = -1.08x

2. 8x - 2(3x + 5y) = 0 Distribute the negative sign: 8x - 6x - 10y = 0

Combine like terms: 2x - 10y = 0

Divide both sides by 2: x - 5y = 0 x = 5y

3. -8x - 4y = 0 This equation does not provide any new information, as it is just a rearrangement of the second equation.

4. -(8x + 4y) - 6y = 0 Distribute the negative sign: -8x - 4y - 6y = 0

Combine like terms: -8x - 10y = 0

Divide both sides by -2: 4x + 5y = 0

Now, we have two equations that express x in terms of y: x = 5y (from equation 2) 4x + 5y = 0 (from equation 4)

Substitute the value of x from the first equation into the second equation: 4(5y) + 5y = 0 20y + 5y = 0 25y = 0 y = 0

Now that we have found the value of y, we can substitute it back into the equation x = 5y: x = 5(0) x = 0

So, the solution to the system of equations is x = 0 and y = 0.