Question

The sum of the cost of 1 kg apple and 1 kg pine-apple is a 150 and the cost of 1 kg apple is twice the cost of 1 kg pine-apple.
find linear equation in two variable
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Answer 1

total cost of 1 kg apple and 1 kg pineapple =150

Let, cost of 1 kg pineapple be x

then,

the cost of apple =2x

we know that total cost of apple and pineapple= 150

hence,

x+2x=150

=>3x=150

=> x= 150/3

=> x =50

Answer 2

I also solved it by elimination.