#23(1,2,3)#24(1,2,3)#25(1,2,3)#26(1,2,3) 30 баллов

Question

#23(1,2,3)#24(1,2,3)#25(1,2,3)#26(1,2,3) 30 баллов

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Answer 1

23.
1) (2/5 + а) + 3/5 = а + (2/5 + 3/5) = а + 5/5 = а + 1,
2) (а + 2/3) + 1/3 = а + (2/3 + 1/3) = а + 3/3 = а + 1,
3) (а + 1 1/4) + 3/4 = а + (1 1/4 + 3/4) = а + 1 4/4 = а + 2,

24.
1) 3/4х * 2/3 = 1/2х (коеф.произв.1/2),
2) 5/6х * 3/5 = 1/2х (коеф.произв.1/2),
3) 2/9х * 3/4 = 1/6х (коеф.произв.1/6),

25.
1) 2/3*(х+6) = 2/3х + 4,
2) 4*(х - 3/4) = 4х - 3,
3) 3/8*(х + 4/5) = 3/8х + 3/10,

26.
1) 7,2х + 1,8х = 9х,
2) 9,3х - 1,4х = 7,9х,
3) 10х - 6,7х = 3,3х