If a+ |a| + b= 7 and a+ |b| - b=6 , then a+ b=  Select the correct option:	A) 3	B) 4	C) 5	D) 6	E) 9
If a+ |a| + b= 7 and a+ |b| - b=6 , then a+ b=   can be done in 2.3 mins :   there are 4 cases to be tested :   1) a is -ve and b is -ve   substituting in the equation , we get a-a+b=7 and a-b-b=6 solve for a and b we get a=20 and b=7 , so a+b=27 REJECT   2)a is +ve and b is +ve   substitute in the equation, we ger a+a+b=7 and a+b-b=6 solve for a and b we get a=6 and b=-5 ,therefore a+b=1 not on list so REJECT   3) a is -ve and b is +ve   substitute , we get a-a=b=7 and a+b-b=6 solve fo a and b we get a=6 and b=7, a+b=13 not on list so REJECT   4) a is +ve and b is -ve   substitute , we get a+a=b=7 and a-b-b=6 solve for a and b , we get a=4 and b= -1 ,a+b=3 , 3NSWER 3
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If a+ |a| + b= 7 and a+ |b| - b=6 , then a+ b=