Question

cât mai repede doresc dau coroniță vreau cu explicație nu numai rezultat

Answer 1

Rezolvarea mai jos
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Answer 2

a) x/y = 4/9 => x = 4y/9
3x+2y/5x+y = (12y/9+2y)/(20y/9+y) =
= (12y/9+18y/9)/20y/9+9y/9) =
= 30y/9 × 9/29y =
= 30y/29y =
= 30/29

b) x/y = 3/5 => x = 3y/5
4x+6y/x+y = (12y/5 +6y)/(3y/5 +y) =
= (12y/5 + 30y/5)/(3y/5 +5y/5) =
= 42y/5 × 5/8y =
= 42y/8y =
= 42/8 =
= 21/4


c) x/4 = y/7 => x = 4y/7
9x-2y/x+3y = (36y/7-2y)/(4y/7+3y) =
= (36y/7-14y/7)/(4y/7+21y/7) =
= 22y/7 × 7/25y =
= 22y/25y =
=22/25