Question

Раскройте скобки и приведите подобные слагаемые:
1) 2,4(8а-9b)-4.1(5b+6c)-1.9(-4a+7c)
2) -15/16(4c-2/3d) - 5/8(16d+1/5k)+3/4(-12c+1/3k)

Answer 1

1) 2,4(8а-9b)-4.1(5b+6c)-1.9(-4a+7c)=19,2a-21,6b-20,5b-24,6c+7,6a-13,3c=26,8a-42,1b-37,9c
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2) -15/16(4c-2/3d) - 5/8(16d+1/5k)+3/4(-12c+1/3k)=-3 3/4c+5/8d-10d-1/8k-9c+1/4k=-12 3/4c-9 3/8d+1/8k