Question

1) 0,8 : x = 2 : 1,5 54/45 = 21/a

Answer 1

Ответ: 0.6

Пошаговое объяснение:

0.8:x = 2: 1,5

x не равен 0

1,2 =2x

делим обе стороны уравнения на 2

Получается что x, не равен 0 и x=0,6

Answer 2

Let's solve both equations:

1. 0.8 : x = 2 : 1.5

To solve this proportion, you can cross-multiply:

0.8 * 1.5 = 2 * x

1.2 = 2x

Now, divide both sides by 2 to isolate x:

x = 1.2 / 2 x = 0.6

So, the value of x is 0.6 in the first equation.

2. 54/45 = 21/a

To solve this equation for 'a,' you can cross-multiply again:

54 * a = 45 * 21

Now, divide both sides by 54 to isolate 'a':

a = (45 * 21) / 54

You can simplify this fraction by dividing both the numerator and denominator by their greatest common divisor, which is 9:

a = (5 * 21) / (6 * 9)

Now, calculate the values:

a = (105) / (54)

a ≈ 1.9444

So, the value of 'a' is approximately 1.9444 in the second equation.