Question

(1 3/4 + x)/1.9=2.5
чему равен "Х"

Answer 1

(7/4+х) :19/10=2,5
(7,4+4х)/4 *10/19
(7,4+4х)/2*5/19=2,5
(5(7+4х))/38=2,5
(35+20х)=95
20х=95-35
20х=60
х=3