What is twelve less than a variable
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First let x equal the unknown variable. Next it says 12 less than x, so write x-12 and set that equal to 51. The equation is : x-12= 51. To solve: The opposite of subtracting is adding, so 12 is added to both sides. This will mean on the left side -12+12 =0 so that the left is just x alone. On the right, it becomes 51+12 = 63. So then you have: x=63 and that is the final answer. If you don’t understand any part of this solution, let me know.

x - 12

Step-by-step explanation:

"twelve" - number

"less than" - switches the entire expression

"a variable" - a unknown number shown as a letter. can be x.

Now we have cut the entire word expression into smaller peices, we can combine it into a actual expression.

12 - x will turn into:

x - 12

Hope this helped.