Question

ajutor pentru teza ofer coronita

Answer 1

19(x+y)=8(2x+3y)
19x+19y=16x+24y
3x=5y
$\frac{x}{y} = \frac{5}{3}$
b)7(6x-2y)=12x+5y
42x-14y=12x+5y
30x=19y
$\frac{x}{y} = \frac{19}{30}$
c)9(6x+2y)=10(5x+3y)
54x+18y=50x+30y
4x=12y|:4
x=3y
$\frac{x}{y} = 3$
d)0,0(6)=$\frac{6}{90} = \frac{1}{15}$
15(x-3y)=2x+7y
15x-45y=2x+7y
13x=52y|:13
x=4y
$\frac{x}{y} =4$
e) 19(2x+5y)=37(4x-y)
38x+95y=148x-37y
110x=132y|:22
5x=6y
$\frac{x}{y}= \frac{6}{5}$
f)18(x+0,5y)=7(3x+y)
18x+9y=21x+7y
3x=2y
$\frac{x}{y} = \frac{2}{3}$