You can put this solution on YOUR website! Make two equations one positive one negative to get rid of the absolute value
1. 2x+7=15 add -7 to both sides
2x=8 divide by 2
x=4
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2. -(2x+7)=15
-2x-7=15 add 7 to both sides
-2x=22 divide by -2
x=-11
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check 4 ok
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check -11 ok
{4, -11}