Answered

|190 - 210| + |19 - 21| + x = 100
In the equation above, what is the value of x?

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Candidoviz
x= 67, because 190- 210= -20 then 19-21= -3 then add -3+-20= +23 
100-23= 77
Shinlea22viz
x=78, because |190-210|= -20, then |19-21|= -2 , then  the equation will became |-20| + |-2| + x = 100 , if you removed the bar the negative sign will became positive , then the equation will became 20 + 2 + x = 100,add 20 and 2,  22 + x = 100, and transpose 22 to the right side of the equation and it became negative, then the equation will be, x=100-22 and x=78...

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