Răspunsuri

2014-09-04T10:26:18+03:00
[(16-2*2+4*2)*a]+3=8
(16-4+8)*a=8-3
(12+8)*a=5
20*a=5
a=5/20
a=0.25

5+15*(25-75:5+25:a)=1150:5
5+15*(25-15+25/a)=230
15*(25-15+25/a)=230-5
15*(10+25/a)=225
10+25/a=225/15
10+25/a=15
25/a=15-10
25/a=5
a=25/5
a=5


3+2*{[72-12*(a-3)]-9*4}=27
2*{72-12*(a-3)]-36}=27-3
2*{72-12*(a-3)]-36}=24
72-12*(a-3)]-36=24/2
72-12*(a-3)]-36=12
12*(a-3)-36=72-12
12*(a-3)-36=60
12*(a-3)=60+36
12*(a-3)=96
a-3=96/12
a-3=8
a=8+3
a=11




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