Question

Tìm x thuộc N,biết:

a) x+245=43.11

b) x-382=159:3

c)7x+2x=918

d)3.(x-2)+150=240

Answer 1

a)x+245=43.11

x+245=473

x=473-245

x=228

Answer 2

b) x-382=159:3

x-382=53

x=53+382

x=435

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Answer 3

c) 7x+2x=918

x.(7+2)=918

x.9=918

x=918:9

x=102

Answer 4

d) 3.(x-2)+150=240

3.(x-2)=240-150

3.(x-2)=90

x-2=90:3

x-2=30

x=30+2

x=32