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A+b+c=625
B-a=2
B-c=12


Răspuns :


[tex]a + b + c = 625 \\ b - a = 2 \\ b - c = 12 \\ a = - 2 + b \\ c = - 12 + b \\ ( - 2 + b) + b + ( - 12 + b) \\ - 2 + b + b - 12 + b = 625 \\ - 14 + 3b = 625 \\ 3b = 625 + 14 \\ 3b = 639 \\ b = \frac{639}{3} \\ b = 213 \\ a = - 2 + 213 \\ a = 211 \\ c = - 12 + b \\ c = - 12 + 213 \\ c = 201[/tex]