Question

1)(3y-7):5=33:15 2)35:(21-5y)=5:2 3)​

Answer 1

Пошаговое объяснение:

(3у - 7) : 5 = 33 : 15

15 * (3у - 7) = 33 * 5

45у - 105 = 165

45у = 165 + 105

45у = 270

у = 270 : 45

у = 6

35 : (21 - 5у) = 5 : 2

5 * (21 - 5у) = 2 * 35

105 - 25у = 70

25у = 105 - 70

25у = 35

у = 35 : 25

у = 1,4

Answer 2

To solve the given equations, let's go through them one by one:

1. (3y-7)/5 = 33/15

To eliminate the fraction, we can cross-multiply:

15(3y-7) = 33(5)

45y - 105 = 165

45y = 270

Dividing both sides by 45:

y = 6

Therefore, the solution to the first equation is y = 6.

2. 35 / (21-5y) = 5/2

To eliminate the fraction, we can cross-multiply:

2(35) = 5(21-5y)

70 = 105 - 25y

Rearranging the equation:

25y = 105 - 70

25y = 35

Dividing both sides by 25:

y = 35/25

y = 7/5

Therefore, the solution to the second equation is y = 7/5 or 1.4.

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