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a+b=147/4 a-b=149/6 a,b=?

Răspuns :

a+b=147/4
a-b=149/6 ==> a=149/6 + b
Inlocuim:
149/6 + b + b = 147/4
149/6 + 2b =147/4
2b = 147/4 - 149/6
2b = 441/12 -  289/12
2b= 152/12
b = 76/12 = 38/6 =19/3
a= 149/6 + 38/6 = 187/6