Question

Помогите чтобы было понятно

Answer 1

$900 times (16 - c) = 5400 \ 16 - c = 5400 div 900 \ 16 - c = 6 \ c = 16 - 6 \ c = 10 \ 900 times (16 - 10) = 5400 \ 5400 = 5400 \ \ \ 400 times( x - 12) = 3600 \ x - 12 = 3600 div 400 \ x - 12 = 9 \ x = 9 + 12 \ x = 21 \ 400 times (21 - 12) = 3600 \ 3600 = 3600$

Answer 2

Спасибо большое

Answer 3

Незачто!

Answer 4

:)

Answer 5

$900 times (16 - c) = 5400 \ 16 - c = 6 \ - c = 6 - 16 \ - c = - 10 \ c = 10$
$400 times (x - 12) = 3600 \ x - 12 = 9 \ x = 9 + 12 \ x = 21$