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a fost răspuns

1) 48-(90-x)=73
2) 145-(x+13)=87
3) (x-48)+87=143
4) 93+(57-X)=100
5) (93-X)-12=48

Răspuns :

Liviu90
1) 48-(90-x)=70
90-x=73-48=25
x=90-25
x= 65

2) 145-(x+13)=87
x+13=145-87=58
x=58-13
x=45

3) (x-48)+87=143
x-48=143-87=56
x=56+48
x=104

4) 93+(57-x)=100
57-x=100-93=7
x=57-7
x=50

5) (93-x)-12=48
93-x=48+12=60
x=93-60
x=33

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