Question

Ajutați va rog frumos

Answer 1

$a)7a=28\cdot3\\a=\frac{84}{7} =12$

$b)3,5a=14\\a=\frac{14}{3,5} =4$

$c)a^2=36\\a=\sqrt{36}=6$

$d)21\cdot0,6=0,9\cdot 2a\\a\frac{12,6}{1,8} =7$