Question

Вычислите значение выражения а-17-(-b)+6,если 4(a+b)=12 ПОМОГИТЕ ПЖ ДАЮ 21 БАЛЛ

Answer 1

4(a+b)=12      а+в=12:4      а+в=3
а-17-(-b)+6=а-17+в+6=а+в-11     если а+в=3   то    а+в-11=3-11=-8

Answer 2

Calculating the Expression

To calculate the value of the expression a - 17 - (-b) + 6 given that 4(a+b) = 12, we can follow these steps:

1. First, let's simplify the equation 4(a+b) = 12 to find the relationship between a and b. 2. Then, we can substitute the value of b into the original expression to find the result.

Simplifying the Equation

The equation 4(a+b) = 12 can be simplified as follows:

4a + 4b = 12

Dividing both sides by 4:

a + b = 3

Substituting the Value of b

Now, we can substitute the value of b into the original expression:

a - 17 - (-b) + 6

Since -(-b) is equivalent to b, the expression becomes:

a - 17 + b + 6

Using the Relationship between a and b

We know that a + b = 3. Therefore, we can rewrite the expression as:

a - 17 + (3 - a) + 6

Simplifying further:

a - 17 + 3 - a + 6

The a and -a terms cancel each other out, leaving:

-17 + 3 + 6

Calculating the Result

Finally, we can calculate the result:

-17 + 3 + 6 = -8

So, the value of the expression a - 17 - (-b) + 6 is -8 given that 4(a+b) = 12.