2x+y=2 then find
4x+2y 

4 is the answer
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2xy=2
xy=2/2
xy=1

4x2y means 4XxX2Xy
As multiplication is commutative we can write it as 4X2XxXy=8Xxy=8X1=8
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2xy=2
xy=1

4x+2y
​4*x+2*y
we can use commutative property
4*2*xy
8*xy
8*1
8

 
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2x+y=2
A.T.Q 4x+2y=!
we see that when we multiply 2 in 2x+y we get 4x+2y at LHS
so, we also multiply 2 with 2 at RHS to balence it
so, we get 4x+2y=4
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