Question

решить уравнение 9,15+(x-8,5)=21,77

Answer 1

9.15+(x-8.5)=21.77
9.15+x-8.5=21.77
x=-9.15+8.5+21.77
x=21.12

Answer 2

$x - 8.5 = 21.77 - 9.15$
$x - 8.5 =12.62$
х = 8.5+12.62
х=21.12