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sa se afle x daca x+2/x=9/2 si x/5-x=3/7

Răspuns :

a) 9x=2x +4 7x=4 => X = 4/7 b ) X/5 - 5x/5 = 3 / 7 -4x /5 = 3/7 -28x =15 × = -15 / 28
a) 9x = 2x+4 7 x = 4 > = X = 4/7 b) x/5 -5x/5=3/7 - 4x/5 =3/7 -28 x =15 x =-15 / 28