SOLUTION: the sum of an unknown number and 12 is subtracted from 4 times the unknown number, the result is the unknown number less 4

Question 222772: the sum of an unknown number and 12 is subtracted from 4 times the unknown number, the result is the unknown number less 4
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
the sum of an unknown number and 12 is subtracted from 4 times the unknown number,
the result is the unknown number less 4
:
Let x = "unknown number"
:
write an equation for that statement:
"sum of an unknown number and 12 is subtracted from 4 times the unknown number,
the result is the unknown number less 4"
:
4x - (x + 12) = x - 4
:
4x - x - 12 = x - 4
:
3x = x - 4 + 12
:
3x - x = 8
:
2x = 8
x =
x = 4
;
;
Check solution in the statement:
the sum of an unknown number and 12 is subtracted from 4 times the unknown
number, the result is the unknown number less 4
4(4) - (4+12) = 4 - 4
16 - 16 = 0
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