Question

(3 2/5+x) : 0,3= 12,5 ДАЮ 40 БАЛЛОВ СРОЧНО!!!

Answer 1

Ответ:      7/20.

Пошаговое объяснение:

(3 2/5+x) : 0,3= 12,5;

3 2/5+x = 12.5 * 0.3;

3 2/5+x=3.75;

x= 3.75 - 3 2/5;

x= 3 75/100 - 3 2/5;

x=3 3/4 - 3 2/5;

x=3 15/20 - 3 8/20;

x=  7/20.

Answer 2

To solve the given equation, let's simplify the expression on the left-hand side (LHS) first:

(3 2/5 + x) ÷ 0.3 = 12.5

First, convert the mixed number 3 2/5 to an improper fraction: 3 2/5 = (5 * 3 + 2) / 5 = 17/5

Substituting this back into the equation, we have: (17/5 + x) ÷ 0.3 = 12.5

To eliminate the division on the LHS, we can multiply both sides of the equation by 0.3:

0.3 * (17/5 + x) ÷ 0.3 = 12.5 * 0.3

Simplifying further: 17/5 + x = 3.75

Now, let's isolate the variable x by subtracting 17/5 from both sides:

17/5 + x - 17/5 = 3.75 - 17/5

Simplifying the left-hand side: x = 3.75 - 17/5

To subtract the fractions, we need a common denominator of 5: x = (3.75 * 5 - 17) / 5

Calculating the numerator: x = (18.75 - 17) / 5 x = 1.75 / 5 x = 0.35

Therefore, the value of x that satisfies the equation is 0.35.