Question

Pole narysowanego prostokąta wynosi???

Answer 1

25x=5y+3
2x+2/5=2y

25x-5y=3/*2
2x-2y=-2/5/*(-5)

50x-10y=6
-10x+10y=2
---------------------
50x-10x=6+2
40x=8/:40
x=8/40
x=2/10
x=0,2

-10x+10y=2
-10*0,2+10y=2
-2+10y=2
10y=2+2
10y=4/:10
y=4/10
y=0,4

P=25x*2y
P=(25*0,2) * (2*0,4)
P=5*0,8
P=4(j²)