Question

1/3x - 4/5x при x=2/3

Answer 1

1×3/2×3-4×3/5×2=3/6-12/10=1/2-6/5=(домнажаем и ту и другую дробь;первую на 5 вторую на 2)=5-12/10=-7/10

Answer 2

To evaluate the expression (1/3)x - (4/5)x when x = 2/3, you simply need to substitute x with 2/3 and perform the arithmetic.

(1/3) * (2/3) - (4/5) * (2/3)

Now, let's calculate each part:

(1/3) * (2/3) = 2/9 (4/5) * (2/3) = 8/15

Now, subtract the second value from the first:

2/9 - 8/15

To perform the subtraction, we need a common denominator, which is 45 (LCM of 9 and 15):

(2/9) * (5/5) - (8/15) * (3/3) (10/45) - (24/45)

Now, subtract:

= (10 - 24) / 45 = -14 / 45

So, the value of the expression (1/3)x - (4/5)x when x = 2/3 is -14/45.