-(м+2n-7)-(-2m-5n+8)

Question

-(м+2n-7)-(-2m-5n+8)

Comments

Упростите вырожение

Answer 1

- (m + 2n - 7) - (- 2m - 5n + 8) = - m - 2n + 7 + 2m + 5n - 8 = 3n + m - 1.