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y- druga liczba
{x + y =92
{40/100x = 3/4 y | *100
{x + y = 92
{40x = 300/4 y
{x + y = 92
{40x = 75y | -75y
{x + y = 92 | *-40
{40x - 75y = 0
{-40x - 40y = -3680
+{ 40x - 75y = 0
-----------------------
-115y = -3680 | /-115
y = 32
{x + y = 92 | *75
{40x - 75y = 0
{75x + 75y = 6900
+{40x - 75y = 0
---------------------
115x = 6900 | /115
x = 60
------- - Kreska ułamkowa
3/4 - ułamki
Lubie takie zadania :P