Question

4/15*(1,5+3)-0,77*(8/11х-3/7)

Answer 1

4/15*4,5-77/100*23/77

4/15*9/2-1/100*23

2/5*3-23/100

6/5-23/100

97/100= 0,97

Answer 2

Let's solve the expression step by step:

1. Calculate the value inside the parentheses first: 1,5 + 3 = 4,5

2. Next, perform the multiplication and addition inside the first set of parentheses: 4/15 * 4,5 = 0.6

3. Now, let's solve the expression inside the second set of parentheses: 8/11 * x - 3/7

4. To simplify further, let's find a common denominator for the fractions in the second set of parentheses. The common denominator for 11 and 7 is 77.

   (8/11) * x - (3/7) * (11/11) * x (8/11) * x - (33/77) * x

5. Combine the terms with 'x': x * (8/11 - 33/77)

6. Find the least common multiple (LCM) for 11 and 77, which is 77. (8/11) * (77/77) - (33/77) * (11/11)

7. Continue simplifying: (8 * 77 - 33 * 11) / 77 (616 - 363) / 77 253 / 77

8. Divide 253 by 77: 253 ÷ 77 ≈ 3.2857 (rounded to four decimal places)

9. Now, substitute the value of x back into the original expression: 0.6 - 0.77 * 3.2857

10. Perform the final calculation: 0.6 - 2.533009 = -1.933009

Therefore, the result of the expression is approximately -1.933.