Question

pomogite reshit zadacu (2+5)-4=2a+5a

Answer 1

7-4=2а+5а
7а=3
а=
$frac{3}{7}$
Ответ:а=
$frac{3}{7}$

Answer 2

7-4=7а
3=7а
7а=3
А=3/7

Answer 3

spasibo ogromnoye pomogli