Răspuns:
(8×4) +a=6×9+16:2
32+a=36+8
32+a=44
a=44-32
a=12
a-(9×8)=(32:4)+225
a-81=8+225
a-81=233
a=233-81
a=152
c-(6×3)=126+(7×5)+27:3
c-18=126+35+9
c-18=161+9
c-18=170
c=170+18
c=188
(7×8)-d=92-10×5
56-d=92-50
56-d=42
d=56-42
d=14
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