Question

Va rog. Ce este incercuit in poză. Puteti face doar subpunctul c) dacă este mai usor. Mersi anticipat.

Answer 1

$c) \\ \dfrac{2x}{2x+1} = \dfrac{1}{5} \Rightarrow 2x \cdot 5 = 1 \cdot (2x+1) \Rightarrow 10x= 2x+1 \Rightarrow 8x=1 \Rightarrow \boxed{x= \dfrac{1}{8}} \\ \\ d) \\ \dfrac{3x+2}{3x+5}= \dfrac{5}{8} \Rightarrow 8 \cdot (3x+2) = 5 \cdot (3x+5) \Rightarrow 24x+16 = 15x+25 \Rightarrow 24x-15x=25-16 \Rightarrow 9x=9 \Rightarrow \boxed{x=1}$

Answer 2

c ) 5×2x= 2x+ 1 ; 10x =2×+1 ; 10×-2×=1; 8×= 1 ; ×=1÷8 ; ×=0,125
d) 5(3×+5)=8(3×+2) ; 15×+25=24×+16 ; 15×-24×= 25-16 ; 9×=9 ; ×= 1