Va rog sa ma ajutati cu asteaaa!!! dau corona +20 punct.
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Răspuns:
[(x X2+3)X4:5+6]+7-8=9
[(x X2+3)X4:5+6]+7=9+8
[(x x 2+3)X4:5+6]+7=17
[(x X2+3)X4:5+6]=17-7
[(x X2+3)X4:5+6]=10
(x X2+3)X4:5=10-6
(x x 2+3)x 4:5=4
(x X2+3)X4=4x5
(x X2+3)X4=20
(x X2+3)=20:4
(x X2+3)=5
x X2=5-3
x x 2=2
x=2:2
x=1