Пошаговое объяснение:
1.
1) 10а + (4-4a)
10a + 4 - 4a
= 6a + 4
2) -(4b-10)+(4-5b)
-4b+10+4-5b
= -9b+14
3)(c-5d)-(-d+5c)
c-5d+d-5c
= -4c-4d
= -4(c+d) один из
4)-(5n+m)+(-4n+8m)-(2m-5n)
-5n-m-4n+8m-2m+5n
-4n+5m
2.
1)0.4*(2+a)-1.5*(a-6)
0.8+0.4a-1.5a+9
9.8-1.1a
2)15*(2/3x-1/6y)-6*(0.5y-1/3x)
10x-2.5y-3y+2x
12x-5.5y
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Answers & Comments
Пошаговое объяснение:
1.
1) 10а + (4-4a)
10a + 4 - 4a
= 6a + 4
2) -(4b-10)+(4-5b)
-4b+10+4-5b
= -9b+14
3)(c-5d)-(-d+5c)
c-5d+d-5c
= -4c-4d
= -4(c+d) один из
4)-(5n+m)+(-4n+8m)-(2m-5n)
-5n-m-4n+8m-2m+5n
-4n+5m
2.
1)0.4*(2+a)-1.5*(a-6)
0.8+0.4a-1.5a+9
9.8-1.1a
2)15*(2/3x-1/6y)-6*(0.5y-1/3x)
10x-2.5y-3y+2x
12x-5.5y