Question

13/42-(y+9/49)=15/42 y=?

Answer 1

Ответ:

y=34/157

Пошаговое объяснение:

раскроим скобки

13:42-у-9:49=15:42

-у=-13/42+15/42+9/49

-у=1/21+9/49

-у=34/157

Answer 2

To solve the equation for y, let's simplify the expression first:

13/42 - (y + 9/49) = 15/42

To combine the fractions on the left side, we need a common denominator. The least common multiple of 42 and 49 is 2,058. Therefore, we'll convert all the fractions to have a denominator of 2,058:

(13 * 49)/(42 * 49) - ((y * 49)/(49 * 1) + (9 * 42)/(49 * 42)) = (15 * 49)/(42 * 49)

617/2058 - (49y + 378)/2058 = 735/2058

Now, we can combine the fractions on the left side:

617 - (49y + 378) = 735

Next, let's simplify further by removing the parentheses:

617 - 49y - 378 = 735

Combine like terms:

-49y + 239 = 735

Move the constant term to the other side:

-49y = 735 - 239

-49y = 496

Finally, solve for y by dividing both sides by -49:

y = 496 / -49

y = -10.122448979591837

Therefore, the value of y is approximately -10.122.