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a fost răspuns

3^x+3^x+1+3^x+2=117 si15x+5mai mic ca 10x+25

Răspuns :

Samsunggenius200
3^x+3^x+1+3^x+2=1173(3x)+3=1173(3x)+3+−3=117+−3
3(3x)=114
3(3x)/3=114/3
3x=38

15x+5<10x+25
15x+5−10x<10x+25−10x
5x+5<25
5x+5−5<25−5
5x<20
5x/5<20/5
x<4

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