Решите номер 25 и 32

Question

Решите номер 25 и 32

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Answer 1

1) 8a-56-5a=3a-56
2) -12x-3+12x=-3
3) -b-1.2+3.1b=2.1b-1.2
4) 4.5c+6-4.5c=6
5) -6.3a-4.2+1.4a=-(4.9a+4.2)
6) -a+3+4.2-3.3a+3=-4.3a+10.2
7) 8.3+4.5a-1.5=4.5a+6.8
8) -6.2x+3.1+6.2x+3.2=6.3

Comments

1) 29/15 *(-27/58)= -27/30= -9/10

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2) -65/18 * 18/10= - 13/2= -6 1/2

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3) 70/33 * 11/140 = 1/4

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3) 70/33 * 11/140 = 1/6 правильно

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4) 20/3 * 105/100= 35/5=7

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5) -28/3 * 75/100= -7

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6) 85/12 * 72/17 = 30