12 - x = 5
Subtract 12 from both sides
12 - 12 - x = 5 - 12
- x = - 7
Divide both sides by -1
-x/-1 = -12/-1
x = 7
For 12-x = 5 to be true
simplly take x on the right side of the equation and put five in the place of x.
12 - 5 = x
now 12 - 5 = 7
therefore the value of x = 7.
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