Question

am nevoie de mare ajutor dau coroana repede

Answer 1

Salutare!

A)

$\bf [(3\cdot a-5):4+14]\cdot 32-104=472$

$\bf [(3a-5):4+14]\cdot 32=472+104$

$\bf [(3a-5):4+14]\cdot 32=576\:\:\:\:\:\:|:32$

$\bf (3a-5):4+14=18$

$\bf (3a-5):4=18-14$

$\bf (3a-5):4=4\:\:\:\:\:\:|\cdot4$

$\bf 3a-5=16$

$\bf 3a=16+5$

$\bf 3a=21\:\:\:\:\:\:|:3$

$\boxed{\bf a = 7}$

B)

$\bf [(2\cdot a+8):7+11]:13+5=6$

$\bf [(2a+8):7+11]:13=6-5$

$\bf [(2a+8):7+11]:13=1\:\:\:\:\:|\cdot13$

$\bf (2a+8):7+11 =13$

$\bf (2a+8):7 =13-11$

$\bf (2a+8):7 = 2\:\:\:\:|\cdot 7$

$\bf 2a+8 = 14$

$\bf 2a = 14-8$

$\bf 2a = 6\:\:\:\:\:|:2$

$\boxed{\bf a=3}$