" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
4,75×12=x
x=57
9×5+3×4=57
Odp: Ma 9 piątek.
12-x-czwórki
{5x+4*(12-x)}:12=4,75
{5x+48-4x}:12=4,75
⁵/₁₂x + 4- ⁴/₁₂x =4,75
¹/₁₂x=4,75-4
¹/₁₂x=0,75
¹/₁₂x=¾/:¹/₁₂
x=¾ * ¹²/₁
x=³⁶/₄
x=9
odp.Zuzanna ma 9 piątek na świadectwie