Автор - julafrol2008

1. -12,7+(x-5,3)=0,9
2. 0,3 - (7,2 + x) = - 1,5
3.
4 times frac {1}{2}  - (1.6 - y) = 7

Ответ

Автор - kseniakaprenko01

1. -12,7+(x-5,3)=0,9

-12,7+x-5,3=0,9

x=0,9+12,7+5,3

x=18.9

2. 0,3 - (7,2 + x) = - 1,5

0,3 - 7,2 - x = - 1,5

-x=-1,5-0,3+7,2

x=1,5+0,3-7,2

x=-5.4

3. 4*frac{1}{2} -(1.6-y)=7

2-1.6+y=7

y=7-2+1.6

y=6.6

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