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45-27+6×a=42
72:a+25-18=16
80-8×c=32

Răspuns :

Anonim1191
•45-27+6×a=42
18+6×a=42
6×a=42-18
6×a=24
a=24:6
a=4
•72:a+25-18=16
72:a+7=16
72:a=16-7
72:a=9
a=72:9
a=8
•80-8×c=32
8×c=80-32
8×c=48
c=48:8
c=6
Coco0987
45 - 27 + 6xa =42
18 + 6x a =42 
6xa =42-18
6xa= 24
a=24:6
a=4

72:a +25 -18 =16
72:a +25=16+18
72:a+25=34
72:a=34-25
72:a= 9
a=72:9
a=8

80 -8 xc =32
8xc= 80-32
8xc=48
c=48:8

c=6

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