Question

A boy works ( X + y ) sums of which only y - 2z are right. How many are wrong

Answer 1

Answer:

X+y-(y-2z)

X+y-y+2z

X+2z

Answer 2

Answer:

x+2z is the answer

Step-by-step explanation:

Let the number of wrong terms ne d

therefore

Y- 2z + d = x+y

d= x+y-y+2z

d= x+2z

therefore the wrong term he did is equal to x+2z

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