Question

9/10*х-4/15*х= 7 3/5​

Answer 1

Ответ:

12

Пошаговое объяснение:

9/10x - 4/15x = 38/5

27x - 8x = 114

19x = 228

x = 12

Answer 2

Ответ:

12

Пошаговое объяснение:

27х/30-8х/30=228/30

Отбрасываем знаменатель:

27х-8х=228

19х=228

х=12

Answer 3

To solve the equation 9/10 * x - 4/15 * x = 7 3/5, you can follow these steps:

Step 1: Find a common denominator for the fractions on the left side of the equation. The common denominator for 10 and 15 is 30.

Rewrite the equation with a common denominator:

(9/10 * x * 3/3) - (4/15 * x * 2/2) = 7 3/5

Step 2: Simplify the fractions on the left side of the equation:

(27/30 * x) - (8/30 * x) = 7 3/5

Step 3: Combine like terms on the left side of the equation:

(27/30 - 8/30) * x = 7 3/5

Step 4: Simplify the fractions in the parentheses:

(19/30) * x = 7 3/5

Step 5: To get rid of the fraction on the left side, multiply both sides of the equation by the reciprocal of (19/30), which is (30/19):

[(19/30) * x] * (30/19) = (7 3/5) * (30/19)

The (30/19) on the left side cancels out, leaving you with:

x = (7 3/5) * (30/19)

Step 6: Calculate the right side of the equation:

x = (7 3/5) * (30/19)

To multiply mixed numbers, convert them to improper fractions:

x = ((7 * 5 + 3)/5) * (30/19)

x = (38/5) * (30/19)

Step 7: Multiply the fractions:

x = (38/5) * (30/19) = (38 * 30) / (5 * 19) = 1140 / 95

Step 8: Simplify the fraction:

x = 12

So, the solution to the equation is x = 12.