Раскройте скобки и приведите подобные слагаемые:
3/4(5,1y−3,3)−3/8(2,6y−7,2) ДАМ 34 БАЛЛА
3/4(5,1y−3,3)−3/8(2,6y−7,2) ДАМ 34 БАЛЛА
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3/4(5,1y−3,3)−3/8(2,6y−7,2) =3/4• 5,1у- 3/4• 3,3- 3/8• 2,6у+ 3/8• 7,2=
0,75•5,1у- 0,75•3,3- 0,375•2,6у+ 0,375•7,2=
3,825у- 2,475- 0,975у+2,7=2,85у-0,225.