Răspuns:
Explicație pas cu pas:
10) (a+b+c)/3=14 ⇒a+b+c=42
d=22
(a+b+c+d)/4==(42+22)/4=16
11) a) (2x+5x+11x)/3=18x/3=6x
b) (21x+37x+32x)/3=90x/3=30x
[tex] \frac{a + b + c}{3} = 14 = > (a + b + c) = 14 \times 3 = 42 \\ d = 22 = > \frac{a + b + c + d}{4} = \frac{42 + 22}{4} = \frac{64}{4} = 16 \\ 11. \: \: \: a) \frac{2x + 5x + 11x}{3} = \frac{18x}{3} = 6x \\ b) \frac{21x + 37x + 32x}{3} = \frac{90x}{3} = 30x[/tex]
sper ca te-am ajutat
