Răspuns:
i) 100-2x2x8-(35:a+15):4=63
100-32-(35:a+15):4=63
68-(35:a+15):4=63
(35:a+15):4=68-63
(35:a+15):4=5
(35:a+15):4=4x5
35:a+15=20-15
35:a=5
a=35:5
a=7
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l) {[(7-3)x5-2+3]:7+9}:a=4
(4x5-2+3):7+9=4
21:7+9=4a
3+9=4a
a=12:4
a=3
