Question

(x-2,5) ×4 1/5=6,3 помогите

Answer 1

(x-2,5)*4¹/₅=6,3
(x-5/2)*21/5=63/10
21x/5-21/2=63/10
21x/5=63/10+21/2
21x/5=(63+21*5)/10
42x/10=(63+105)/10  |×10
42x=168  |÷42
x=4.
Ответ: x=4.