Question

(x-1)•20/5=(5+x)•20/2+3x•20/4 Момогите плиз(/-дробная черта)

Answer 1

(x-1)×20/5=(5+x)×20/2+3x×20/4
4x-4=50+10x+15x
4x-25x=54
-21x=54
x=-21/54=-7/18