(5/8 mn+1.4m^2k+0.3km^2−2.5n^3k) −( 1/2 mn+4kn^3+ 1/8 mn)

Step-by-step explanation:    

We have been given an expression and we are asked to simplify our given expression.

First of all we will remove parenthesis.  

Let us combine like terms.

Let us have a common denominator.

Upon combining like terms we will get,

Let us factor out k.

Therefore, our expression simplifies to .

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

-12 > a

step-by-step explanation:

-11 > 1 + a

subtract 1 from each side

-11-1 > 1-1+a

-12 > a