Question

51/70:(5/18-7/15)+2*3 13/1420 баллов​

Answer 1

Ответ:

$\frac{12}{7}$

Пошаговое объяснение:

я так думаю

Answer 2

To solve the expression you provided, let's break it down step by step:

Step 1: Simplify the fraction within the parentheses. (5/18 - 7/15)

To subtract fractions, we need a common denominator. The least common multiple (LCM) of 18 and 15 is 90.

5/18 = (5/18) * (5/5) = 25/90 7/15 = (7/15) * (6/6) = 42/90

Now we can subtract the fractions:

(25/90 - 42/90) = -17/90

Step 2: Multiply the result from step 1 by 2. -17/90 * 2 = -34/90

Step 3: Simplify the fraction -34/90. The greatest common divisor (GCD) of 34 and 90 is 2, so we can simplify the fraction:

-34/90 = (-34/2)/(90/2) = -17/45

So far, we have: -17/45

Step 4: Perform the final addition. -17/45 + 2 * 3

First, multiply 2 by 3: 2 * 3 = 6

Now, add -17/45 and 6: -17/45 + 6 = (6 * 45 - 17)/45 = (270 - 17)/45 = 253/45

Therefore, the final result is 253/45 or approximately 5.622, depending on the required level of precision.