Question

A confectioner had some boxes for burger and he bought 50 more boxes. After two days half of these boxes were used and only 40 boxes were left. Find the number boxes he had in the beginning.
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Answer 1

Answer:

30

Step-by-step explanation:

30+50÷2=40

He had 30 in the begining

Answer 2

Let's say that the confectioner had x boxes

Then he bought 50 more boxes- x + 50 ÷ 2= 40

The ÷ 2 sign will go towards the right side, so it will be multiplied by 2

- x + 50= 40 x 2

- x + 50= 80

Now, + 50 will go towards the right side, so it will be subtracted by 50

- x= 80-50

- x= 30