№1.Упростите выражение:

4\9(2,7а-2 1\4b)-4,2(5/7a-0,5b)=?

№2.Решите уравнение:

0,3(х-2)-0,2(х+4)=0,6.

№3.Раскройте скобки и подчеркните коэффициент:

(4а-2b+3c-2d)*(-4)


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