Question

Решите пожалуйста, буду благодарен тому кто сделает!:D

Answer 1

1.а) - ( -a + b ) + ( d - c ) = a - b + d -c 
   б) - m - ( a - b ) - n = - m - a + b - n 
   в) k - ( - t + p - c - l ) = k + t - p + c + l
   г) a - ( c - l - f ) + ( - k - f + n ) = a - c + l + f - k - f + n = a - c + l - k + n 
2. - ( - 4.66 + 12 ) - ( 4 1/6 - 7.9 ) + ( 1 2/3 - 2.36 ) = 4.66 - 12 - 4 1/6 + 7.9 + 1 2/3 - 2.36= -1.8 - 3 1/2 = - 1.8 - 3.5 = - 5.3
3. -5.8 - ( - x + 3.7 ) = 4.5 
    -5.8 + x - 3.7 = 4.5 
     x = 4.5 + 3.7 + 5.8
     x = 14
4. - 4 ( a - 3 ) + 2 ( 6 - a ) = -4a + 12 + 12 - 2a = - 6a + 24 ; при a= -4
-6a + 24 = 24 + 24 = 48
5. x - ( - 5x - ( x + ( - 2x - ( 3x - 8 )))) = x - ( - 5x - ( x + ( -2x - 3x + 8 ))) = x - ( - 5x - ( x -2x - 3x + 8)) = x - ( - 5x - x + 2x + 3x - 8 ) = x + 5x + x - 2x - 3x + 8 = 2x + 8 = 2 (x+4)