Question

1,9-(5,75-(х+1))=3,15

Answer 1

1,9-(5,75-(х+1))=3,15, -(5,75-(х+1))=3,15-1,9, (х+1)-5,75=1,25, х+1=1,25+5,75, х+1=7, х=7-1, х=6