22
x=nr nuci
x/3=nuci nepot 1
x-x/3=2x/3=rest
2x/3 *1/3=2x/9 =nuci nepot 2
2x/3-2x/9=(6x-2x)/9=4x/9=rest
4x/9 *1/3=4x/27= nuci nepot 3
x/3+2x/9+4x/27+40=x inmultim cu 27
9x+6x+4x+1080=27x
19x+1080=27x
8x=1080
x=135 nuci
23
a+b+c=180⁰
a=2b b=a/2
a=c-40⁰ c=a+40⁰
a+a/2+a+40⁰=180⁰
2a+a/2=180⁰-40⁰
2a+a/2=140⁰ inmultim cu 2
4a+a=280⁰
5a=280⁰
a=56⁰
b=56⁰/2=28⁰
c=56⁰+40=96⁰
24.
x=cantitate marfa
2x/7=ziua1
x-2x/7=5x/7 =rest
5x/7*13/25+379=13x/35+379=ziua 2
2x/7+13x/35+379+2561=x inmultim cu 35
10x+13x+2940*35=35x
12x=102900
x=8575 kg
