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Stiind ca xy+xz+5x=485, y+z=92

Răspuns :

xy+xz+5x=485
x(y+z)+5x=485
x×92+5x=485
92x+5x=485
97x=485
x=485/97
x=5
y+z=92 90+2=92




xy+xz+5×=485 92×5=485