Simplify the expression. [(4 + 3) x 5 - 6] x 2

[(4 + 3) x 5 - 6] x 2

= [7 x 5 - 6] x 2

= 29 x 2

= 58

63.56-81.47.

Step-by-step explanation: The given expression is 63.56+(-81.47). Since both 63.56 and 81.47 are real numbers, so we will follow the addition and subtraction rules followed by the set of real numbers. For any two real numbers, we have the following rules-

a+(-b)= a-b,

a-(-b)=a+b,

-a+(-b)= -a-b,

-a-(-b)= -a+b.

We will follow first rule here that  a+(-b)= a-b. So,

63.56+(-81.47)=63.56-81.47.