12 - x = 9
add x to both sides
12 = x + 9
subtract 9 from both sides
3 = x
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x can also be -3
because |-3| = 3
complete solution to 12-|x| = 9 is
12-x = 9
-12frm both sides
-x/1 = -3/1 this what i get.
2 answers
thank you damon :)
1 answer