Question

|1/5 - 3х|+7 целый 3/5 при х=4/5​

Answer 1

Ответ:

$9\frac{4}{5}$ (ответ 9 целых 4/5)

Пошаговое объяснение:

$|\frac{1}{5} -3x|+7\frac{3}{5}$

$x=\frac{4}{5}$

$|\frac{1}{5} -3*\frac{4}{5}|+7\frac{3}{5} =|\frac{1}{5} -\frac{12}{5}|+7\frac{3}{5} =|-\frac{11}{5} |+7\frac{3}{5}=\frac{11}{5} +7\frac{3}{5} =2\frac{1}{5}+7\frac{3}{5} =9\frac{4}{5}=\frac{49}{5}$

Answer 2

To evaluate the expression "|1/5 - 3x| + 7" when x = 4/5, we first need to substitute the value of x into the expression and then perform the necessary calculations step by step.

Step 1: Substitute x = 4/5 into the expression "|1/5 - 3x| + 7": |1/5 - 3(4/5)| + 7

Step 2: Simplify the expression inside the absolute value: |1/5 - 12/5| + 7

Step 3: Perform the subtraction inside the absolute value: | -11/5 | + 7

Step 4: Take the absolute value of -11/5: |11/5| + 7

Step 5: The absolute value of a fraction is always positive, so |11/5| = 11/5: 11/5 + 7

Step 6: To add fractions, we need a common denominator. The common denominator here is 5: (11/5) + (7 * 5/5)

Step 7: Perform the addition: (11/5) + 35/5

Step 8: Combine the fractions: (11 + 35)/5

Step 9: Calculate the numerator: 46/5

The final answer is 46/5 or 9 1/5 when expressed as a mixed number.