Question

8у-3(2у-3)=7у-20у+8 5(2у-9)+6у=4(-3у-2)-215у+7(3-4=3(5-2у)-67у-4(3у+5)=2-3(4у-9решите срочно дом 12 Баллов​

Answer 1

Ответ:

$1)8y - 6y + 3 - 7y + 20y - 8 = 0 \\ 15y = 5 \\ y = \frac{5}{15} = \frac{1}{3} \\ 2)10y - 45 + 6y = - 12y - 8 - 21 \\ 10y + 6y + 12y = 45 - 8 - 21 \\ 28y = 16 \\ y = \frac{16}{28} = \frac{4}{7} \\ 4)7y - 12y - 20 = 2 - 12y + 27 \\ 7y = 49 \\ y = 7 \\ 3)5y + 7(3 - 4) = 3(5 - 2y) - 6 \\ 5y - 7 = 15 - 6y - 6 \\ 11y = 16 \\ y = \frac{16}{11} \\ 3)5y + 7(3 - 4y) = 3(5 - 2y) - 6 \\ 5y + 21 - 28y = 15 - 6y - 6 \\ 5y + 6y +28y = 15 - 6 - 21 \\ 39y = - 12 \\ y = - \frac{12}{39} \\ y = - \frac{4}{13}$

в 3 у в скобках не дописали? решила и так и так.

Answer 2

Solving the Equation

To solve the given equation, we'll follow the order of operations (PEMDAS - Parentheses, Exponents, Multiplication and Division, Addition and Subtraction) and simplify the equation step by step.

First, let's simplify the left-hand side of the equation: 8y - 3(2y - 3) = 7y - 20y + 8

We'll start by distributing the -3 to the terms inside the parentheses: 8y - 3 * 2y + 3 * 3 = 7y - 20y + 8

This simplifies to: 8y - 6y + 9 = 7y - 20y + 8

Now, let's simplify the right-hand side of the equation: 5(2y - 9) + 6y = 4(-3y - 2) - 21

We'll start by distributing the 5 and 4 to the terms inside the parentheses: 10y - 45 + 6y = -12y - 8 - 21

This simplifies to: 16y - 45 = -12y - 29

Continuing the Solution

Now, let's combine like terms on both sides of the equation: 8y - 6y + 9 = 7y - 20y + 8 This simplifies to: 2y + 9 = -13y + 8

And for the right-hand side: 16y - 45 = -12y - 29

Next, we'll isolate the variable terms on one side of the equation: 2y + 13y = 8 - 9 This simplifies to: 15y = -1

And for the right-hand side: 16y + 12y = -29 + 45 This simplifies to: 28y = 16

Finally, we'll solve for y: y = -1/15

And for the right-hand side: y = 16/28 This simplifies to: y = 4/7

So, the solution to the given equation is: y = -1/15 or y = 4/7