Question

(3x+2x)*8=6400 решите пожаста

Answer 1

5x*8=6400

5x=6400/8

5x=800

x=800/5

x=160

Answer 2

$(3x+2x)cdot8=6400$

 

$3x+2x=6400:8$

 

$5x=800$

 

$x=800:5$

 

$x=160$

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$(3cdot160+2cdot160)cdot8=6400$ (это проверка)

 

$(480+320)cdot8=6400$

 

$800cdot8=6400$

 

$6400=6400$