10. Решите уравнение:
1) –1,4х = –4,27;     2) 1,8у = –3,69;      3) 1,2а = –7,26;         4) –1,6b = –6,48;
1) у : 3,1 = –6,2;   2) х : (–2,3) = –4,6;    3) b : (–3,6) = –7,2;    4)  х : (–2,3) = 0.
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