Question

Реши уравнения: а) х + ( 1200 - 900 ) = 1500 б) (50*30) : y = 15 в) c : (1200 : 2 ) = 3 заранее

Answer 1

а) $x+(1200-900)=1500$

$x+300=1500$

$x=1500-300$

$x=1200$

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$1200+(1200-900)=1500$ (это проверка)

$1200+300=1500$

$1500=1500$

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б) $(50\cdot30):y=15$

$1500:y=15$

$y=1500:15$

$y=100$

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$(50\cdot30):100=15$

$1500:100=15$

$15=15$

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в) $c:(1200:2)=3$

$c:600=3$

$c=3\cdot600$

$c=1800$

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$1800:(1200:2)=3$

$1800:600=3$

$3=3$

Answer 2

а) х+(1200-900)=1500

х+300=1500

х=1500-300

х=1200

б)(50*30):у=15

1500:у=15

у=1500:15

у=100

в)с:(1200:2)=3

с:600=3

с=600*3

с=1800