Question

10, 11, 12 am nevoie de rezolvare urgenta

Answer 1

10. a=2b/7
a)5a/b=10b/7b=10/7
b)a/8b=2b/56b=1/28
c)3a/2b=6b/14b=3/7
d)9b/5a=63b/10b=63/10
e)a²/b²=4b²/49b²=4/49
f)a³/b³=8b³/343b³=8/343
g)2b²/7a²=2b²x49/28b²=7/2

11.a=3b/7
a)a/b=3/7
b)3b/2a=3bx7/6b=7/2
e)(2ab-a²)/(b²+3a²)=33/76

12.x=3y/5
a)(x+y)y=(3y/5+y)/y=8y/5y=8/5
b)x/(y-x)=3y/5//(y-3y/5)=3y/2y=3/2
c)(2y-x)/3y=(2y-3y/5)/3y=7y/15y=7/15
d)(2x+y)/(7y-2x)=(6y/5+y)/(7y-6y/5)=11y/29y=11/29
e)(x²+y²)/(y²-x²)=(9y²/25+y²)/(y²-9y²/25)=34y²/16y²=17/8
f)3xy/(2y²-x²)=9y²/5//(2y²-9y²/25)=9y²/5x25/41y²=45/41
g)(5x³-y³)/(y³-3x³)=(5x27y³/125-y³)/(y³-81y³/125)=10y³/44y³=5/22