self Maths Puzzle

If 2a-b=4 and 3b+2c =44, then the value of a+b+c is:
(A) 22
(B) 24

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self Other Question

If cos2theta -sin2theta=1/3, value of (cos4theta-sin4theta+1) is:

(A) 4/3

(B) 5/3
If (sin theta + cos theta)/(sin theta - cos theta)=7, then the value of tan theta is equal to :
(A) 4/3
(B) 5/3