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A + B = 1,5 ; A-B = 0,6. Afla cat este A ? Afla cat este B?

Răspuns :


[tex]a = \frac{3}{2} - b[/tex]
[tex] \frac{3}{2} - b - b = \frac{ 3}{5} [/tex]
[tex]2 \times ( - b) = \frac{9}{10} [/tex]
[tex] - b = \frac{9}{10} \times \frac{1}{2} [/tex]
[tex]b = - \frac{9}{20} [/tex]
[tex]a = \frac{39}{20} [/tex]