1552.
Упростите выражения:
1) 5,3х + 8 – 7,2у – 2,5х + 10у – 9,4;
2) а
2 1, 3 1
а + — + — — + — а — 2b + 4с;
3 7 4 2

3) 0,3х – 9у – 1,5 + 6,2х – 5,6y +4.
Упростите выражения. Определите коэффициенты
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