Question

10 БАЛОВ. математика 6 класс помогите плиз

Answer 1

a) (x +1/3)*2=0.8; 2x+2/3=8/10; 8/10=4/5=12/15; 2/3=10/15; 2x= 12/15-10/15=2/15; x=1/15 б) (2.5+y)*2=(6+2y)*5/2; 5+2y=15+5y; 3y=-10; y= -3/10