Question 695126
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
--
2. -(2x+7)=15
-2x-7=15 add 7 to both sides
-2x=22 divide by -2
x=-11
--
check 4
{{{abs(2(4)+7)=15}}}
{{{abs(8+7)=15}}}
{{{abs(15)=15}}} ok
--
check -11
{{{abs(2(-11)+7)=15}}}
{{{abs(-22+7)=15}}}
{{{abs(-15)=15}}} ok
{4, -11}