Question

-3*(5-7x)=16+19x до 12 45 нужно срочно

Answer 1

Ответ:

Смотри решение на фото...

Answer 2

Пошаговое объяснение:

$- 3 \times (5 - 7x) = 16 + 19x \\ - 15 + 21x = 16 + 19x \\ - 15 + 21x - 19x = 16 \\ - 15 + 2x = 16 \\ 2x = 16 + 15 \\ 2x = 31 \\ x = \frac{31}{2} = 15 \frac{1}{2} = 15.5$

Answer 3

To solve the equation -3*(5-7x) = 16 + 19x + 12 + 45, we will follow the steps below:

Step 1: Simplify the equation

First, let's simplify both sides of the equation by applying the distributive property and combining like terms:

-3*(5-7x) = 16 + 19x + 12 + 45

Simplifying the left side: -3*(5-7x) = -3*5 + (-3)*(-7x) = -15 + 21x = 21x - 15

Simplifying the right side: 16 + 19x + 12 + 45 = 16 + 12 + 45 + 19x = 73 + 19x

So the equation becomes: 21x - 15 = 73 + 19x

Step 2: Isolate the variable

Next, let's isolate the variable on one side of the equation. To do this, we will subtract 19x from both sides:

21x - 15 - 19x = 73 + 19x - 19x

Simplifying both sides: 2x - 15 = 73

Step 3: Solve for x

Now, let's solve for x by adding 15 to both sides of the equation:

2x - 15 + 15 = 73 + 15

Simplifying both sides: 2x = 88

Finally, divide both sides of the equation by 2 to solve for x:

2x/2 = 88/2

Simplifying both sides: x = 44

Therefore, the solution to the equation -3*(5-7x) = 16 + 19x + 12 + 45 is x = 44.

Please let me know if there's anything else I can help you with!