(х+3) / 28 = 4,5 / 7

Question

(х+3) / 28 = 4,5 / 7

Answer 1

Делим обе стороны на 7.
(х+3)/4=4,5
х+3=4,5*4
х+3=18
х=15

Answer 2

7×(х+3)=4,5×28
7х+21=126
7х=126-21
7х=105
х=105/7
х=15