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Let the number be 'x'

Half of 'x' is written as x/2

To take '7' away we write

''(x/2) - 7 ' Note the use of brackets, because if written as 'x/2 - 7 ' are we subtracting '7' from '2' only. So the brackets give clarity that the '7' is being subtracted from the term inside the brackets, which is 'half of 'x''.

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lenpollock

Lvl 16
2w ago

What else can I help you with?