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Faceti exercitiile incercuite!

Faceti Exercitiile Incercuite class=

Răspuns :


2x+2a+ab+ac=60
2x+8+ab+ac=60
2x+ab+ac=52
a(b+c)+2x=52
4*8+2x=52
32+2x=52
2x=20
x=10