Hey there :)
We have been given a variable x to represent the unknown number
The sentence is:
six subtracted from a number equals 42
The first number in subtraction is called Minuend
And the number that is after the minus sign is called Subtrahend
Since 6 is being subtracted from, the equation will be
[ x - 6 = 42 ]
Extras
x - 6 = 42
x = 48