Question

решите уравнение : 1). ( 1-7/10 )×х=2 1/4 ; 2). (1/4+1/5)×х= 1 4/5; 3). (3 1/8+1 3/4 )×х=2 1/6; 4). (2 1/12 - 1 5/6 )×х=3/4.

Answer 1

(1-7/10) * x = 9/4
3/10 * x = 9/4
x = (9*10)/(4*3)
x = 90/12
x = 7,5

Answer 2

(25/12 - 11/6 )*х = 3/4
(3/12)*х = 3/4
х = 3

Answer 3

не так,