Question

Rozwiąż równanie

a) ⁴/x = ⁵/₉
b)⁹,³⁶/₇,₂ = ¹,³/x
c) x-5/₇ = ⅗

Answer 1

A) 4/x = 5/9
( mnożysz na krzyż )
5*x = 4*9
5x = 36
x = 7,2

b) 9,36/7,2 = 1,3/x
9,36x = 1,3 * 7,2
9,36x = 9,36
x = 1

c) x-5/7 = 3/5
5(x-5) = 7*3
5x-25 = 21
5x = 46
x = 9,2