Решить уравнения помогите))3х=2/95 11/14x-8/15=5/217 3/10+25/28x=8 13/353 1/3- 1/20x=1...

Question

Решить уравнения помогите))
3х=2/9
5 11/14x-8/15=5/21
7 3/10+25/28x=8 13/35
3 1/3- 1/20x=1 14/15

Answer 1

3x=2/9
3x-2/9=0
(27x-2)/9=0
27x=2
x=2/27

5 11/14x-8/15=5/21

Comments

x=5

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3 1/3- 1/20x=1 14/15
3/3-1/20x=14/15

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(20x-1)/20x=14/15

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(20x-1)*15=20x*14=3/4

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x=3/4

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7*3/10+25/28x=8*13/35
(294x+125)/140x=104/35

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(294x+125)*35=140x*104

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x=125/122

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dct

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все