Question

a+b+c=1500
a+b=978
c=a-19
a=c+19

Answer 1

$a + b + c = 1500$
$a + b = 978$
$978 + c = 1500$
$c = 1500 - 978......c = 522$


$c = a - 19$
$522 = a - 19$
$a = - 522 - 19........a = - 541$

$a = c + 19$
-541 = c + 19
c =541+19
c = 560

Sper ca te am ajutat !!!!