Решить уравнения. Реш.итебольшое спасибо!

a)

2 5/15x + 1 1/15x = 6 4/5

3 6/15x = 6 4/5

3 2/5x = 6 4/5

x = 6 4/5 : 3 2/5

x = 34/5 * 5/17

x = 2

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( x - 3/5x) * 1 1/24 = 1 1/6 + 1 3/4

2/5x * 1 1/24 = 1 2/12 + 1 9/12

2/5x * 1 1/24 = 2 11/12

2/5 = 2 11/12 : 1 1/24

2/5x = 35/12 * 24/25

2/5x = 14/5

x = 14/5 * 5/2

x = 7