Question

47,4 / 12 = 3,16/2x 4 34/72:x =2:7/81 8:[3x]=2:1,5

Answer 1

Ответ:

12*3,16=2x*47,4

37,92=94,8x

x=37,92/94,8

x=0,4

322/72:x=2:7/81

322*81=(72:x)*(2:7)

26082=144/7x

7x=144:26082

x=(144:26082)/7

8*1,5=3x*2

12=6x

x=12:6

x=2

Answer 2

To solve this set of equations, we can break it down step by step:

1. 47.4 / 12 = 3.95
2. 3.16 / 2 = 1.58
3. 4 34/72 ÷ x = 2 / 7/81

Let's simplify the fractions in equation 3:

3. 4 17/36 ÷ x = 2 / 7/81

To solve for x, we can multiply both sides of the equation by the reciprocal of the fraction on the right side:

4 17/36 ÷ x = 2 / (7/81) (4 17/36) / x = 2 / (7/81)

Now, let's solve for x by multiplying both sides by the reciprocal of (4 17/36):

x = (2 / (7/81)) / (4 17/36)

To divide by a fraction, you can multiply by its reciprocal:

x = (2 / (7/81)) * (36 / (4 17/36))

x = (2 / (7/81)) * (36 / (4 + 17/36))

Now, calculate this:

x = (2 / (7/81)) * (36 / (4 + 17/36)) x = (2 / (7/81)) * (36 / (145/36))

Now, multiply the fractions:

x = (2 / 7/81) * (36 / 145/36)

To multiply fractions, multiply the numerators together and the denominators together:

x = (2 * 36) / (7/81 * 145/36)

x = (72) / (1015/36)

Now, divide the fractions:

x = 72 / (1015/36)

To divide by a fraction, you can multiply by its reciprocal:

x = 72 * (36/1015)

Now, calculate this:

x = (72 * 36) / 1015

x ≈ 2.55

So, the solution for x is approximately 2.55.

Now, let's move on to the last equation:

4. 8 / [3x] = 2 / 1.5

First, simplify the right side:

8 / [3x] = 2 / 1.5 8 / [3x] = 4/3

To solve for [3x], we can cross-multiply:

8 * 3 = 4 * [3x] 24 = 12x

Now, solve for x:

12x = 24 x = 24 / 12 x = 2

So, the solution for x in the last equation is x = 2.

To summarize:

• x ≈ 2.55 from the equation 4 17/36 ÷ x = 2 / 7/81
• x = 2 from the equation 8 / [3x] = 2 / 1.5