Question

Помогите_____________________________

Answer 1

13/18х-7/30=3/10х+1/12
13/18х-3/10х=7/30+1/12
65/90х-27/90х=14/60+5/60
38/90х=19/60
х=19/60:38/90
х=19/60*90/38
х=3/4

Answer 2

Общий знаменатель 180
$frac{13*10x}{18*10} - frac{7*6}{30*6} = frac{3*18x}{10*18} + frac{1*15}{12*15}$ 
$frac{130x}{180} - frac{42}{180} = frac{54x}{180} + frac{15}{180}$
 130x - 42 = 54x + 15
130x - 54x = 42 + 15
76x = 57
x= 57 : 76 
x = 0.75