Решите уравнения: а) 0,3(5x-7)=3(0,2x+3,2)
б) 4(1,2x+3,7)-2,8=5,2x
в) (4 1/6y+11 1/4)4/15=2/3y+5 2/3

а) 4(3-x)-11=7(2x-5)
б) 0,9(4y-2)=0,5(3y-4)+4,4 
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