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a+b=103 bmai mare cu 5 decat a

Răspuns :

b=a+5

a+a+5=103 <=> 2a=103-5 <=> 2a=98 <=> a=59 => b=103-59=54
b= a+5
a+ a+5= 103
2a+5=103
2a= 103-5
2a= 98
a= 98:2
a= 49 
b= 49+5
b= 54