ajutati va rog frumos dau coroana numbing d

Răspuns:
c)(x+1)7,2=(18×5+4)/5×(10+3)/10
x+1=(95×13/10)/7,2
x+1=123,5/7,2=1235/72
x=(1235-72)/72=1163/72
14×(2x-1)=126/5×15
14(2x-1)=378
28x-14=378
x=(378+14)/28
x=392/28
x=14