Question

Упростите выражение (15-a-b)-(a-b+35)+(a+b)

Answer 1

(15 - a - b) - (a - b + 35) + (a + b) =
= 15 - a - b - a + b - 35 + a + b =
= (15 - 35) + (a - a - a) + (b - b + b) =
= - 20 + (- a) + b =
= b - a - 20