Question

[(Xx2) :6]:5=13
[(X:9)x10]x7=140 ajutorrrrrrrrrrrr
Dau 20 puncte
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Answer 1

[(Xx2) :6]:5=13

(Xx2) :6=13×5

X×2=65×6

X×2=390

X=390:2

X=195

[(X:9)x10]x7=140

(X:9)x10=140:7

X:9=20:10

X=2×9

X=18