Question

2b - 5 = -3 2/7 пожалуйста​

Answer 1

Ответ:

b=6/7

Пошаговое объяснение:

$2b-5=-3\frac{2}{7} 2b-5=-\frac{23}{7} 2b=\frac{12}{7} b=\frac{6}{7}$

Answer 2

To solve the equation 2b - 5 = -3 2/7, follow these steps:

Step 1: Convert the mixed number -3 2/7 to an improper fraction. To do this, multiply the whole number (-3) by the denominator (7) and add the numerator (2). Then, place the result over the original denominator (7):

-3 * 7 + 2 = -21 + 2 = -19 The improper fraction is -19/7.

Step 2: Rewrite the equation with the improper fraction: 2b - 5 = -19/7

Step 3: Isolate the variable 'b' on one side of the equation. Add 5 to both sides of the equation to get rid of the constant term (-5) on the left side:

2b = -19/7 + 5

Step 4: Find the common denominator for the fractions and add them. To add fractions, you need to have a common denominator. In this case, the common denominator is 7. So, you need to convert 5 to a fraction with a denominator of 7:

5 = 5 * 7 / 7 = 35/7

Now, add the fractions:

-19/7 + 35/7 = (-19 + 35) / 7 = 16/7

Step 5: Solve for 'b' by dividing both sides by 2: b = (16/7) / 2 = 16/7 * 1/2 = 16/14 = 8/7

So the solution to the equation is:

b = 8/7