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how do you solve 5[3-(7-8)]

spizzo33  May 24, 2017
 #1
avatar+2194 
+2

\(5[3-(7-8)]\) simplifies to 20

 

An equation must have an equal sign, which \(5[3-(7-8)]\) lacks, so \(5[3-(7-8)]\) is an expression—not an equation.

 

Let's evaluate this expression step by step:

\(5[3-(7-8)]\) This is the original expression. First, simplify what is in the inner parentheses.
\(5[3-(-1)]\) Subtracting a negative number is the same as adding a positive
\(5[3+1]\) Simplify 3+1
\(5[4]\) Brackets are another way to represent parentheses. A number without an operation directly beside parentheses is always multiplication
\(5*4\) Simplify 5*4
\(20\)  
   
TheXSquaredFactor  May 24, 2017
 #2
avatar+7023 
0

5[3 - (7 - 8)]

Always do stuff in the smallest bracket(parenthese) first.

= 5[3 - (-1)] 

= 5(3 + 1) <--- Minus minus equals plus

= 5(4) <--- do stuff in the bracket

= 20 :D

MaxWong  May 25, 2017

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