Question

lesson :simple linear equations
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Answer 1

10. Let the nos. be x and x+2 respectively.

Then, x+x+2=30

Or,2x+2=30

Or,2x=30-2=28

Or,x=28/2=14

Or,x+2=14+2=16

11.Let the length and breadth be x and x-9 respectively.

Then, 2(x+x-9)=1234

Or,2(2x-9)=1234

Or,4x-18=1234

Or,4x=1234+18=1252

Or,x=1252/4=313m

Or,x-9=313-9=304m

Hence, the dimensions are 313*304 m

12.Let the weight of third packet be x g.

Then, the weight of first and second packet will be x+100 g & x+50 g respectively.

According to the question

x+x+100+x+50=750

Ot,3x+150=750

Or,3x=750-150=600

Or, x=600/3=200g

Or, x+100=200+100=300g

Or,x+50=200+50=250g

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