Розв’яжіть рівняння: а) 5х-7=4х+1;
б) 4х+5,5=2х-3,5;
в) 2(3х+2)+х=5х+4;
г) (х-1)/2 - 2х/3 = (х+3)/3. ( / -це риска дробу)
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