Question

a-45*2=900 уравнение

Answer 1

$a-45\times2=900\\\\a-90=900\\\\a-90+90=900+90\\\\a=990\\\\Otvet:\quad 990.$

Answer 2

a - 45 * 2 = 900

a - 90 = 900

a = 900 + 90

a = 990

Ответ: 990