Question

if a=x+2y b=x-2y,find(2a+b)-(a-2b)
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Answer 1

Answer:

a=x+2y and b=x-2y

(2a+b)-(a-2b)

(2(x+2y) +(x-2y))-((x+2y)-2(x-2y))

(2x+5y+x-2y)-(x+2y-2x+4y)

2x+5y+x-2y-x-2y+2x-4y

4x-3y