Question

(600-x)-x=450

Answer 1

(600-x)-x=450
600-x-x=450
600-(x+x)=450
600-2x=450
2x=150
x=75

Answer 2

\(\left(600-x\right)-x=450\)

\(\Rightarrow600-x-x=450\)

\(\Rightarrow600-2x=450\)

\(\Rightarrow2x=600-450\)

\(\Rightarrow2x=150\)

\(\Rightarrow x=150:2\)

\(\Rightarrow x=75\)

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Answer 3

( 600 - x ) - x = 450

\(\Rightarrow\)600 - x - x = 450

\(\Rightarrow\)600 - ( x + x ) = 450

\(\Rightarrow\)600 - 2x = 450

\(\Rightarrow\)2x = 600 - 450 = 150

\(\Rightarrow\)x = 150 : 2 = 75

vậy x = 75

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