If `3x+7y=75` and `5x-5y=25` , then what is the value of `x+y` ? (a) 14 (b) 15 (c) 16 (d) 17 (e) None of these

If (x+y)=3 , x y=2 , then what is the value of x^3+y^3 ? (a) 6 (b) 7 (c) 8 (d) 9 (e) None of these

If 2x+y=17;y+2z=15 and x+y=9 then what is the value of 4x+3y+z?(a)41 (b) 43(c)45 (d) 55 (e) None of these

If 3x-4y+z=7; 2x-z+3y=19 ; x+2y+2z=24 , then what is the value of z ? (a) 4 (b) 5 (c) 6 (d) 8

If x+y=15 a n d x y=56 , then what is the value of x^2+y^2? (a) 110 (b) 113 (c) 121 (d) Cannot be determined (e) None of these

If 3x-5y=5 and (x)/(x+y)=(5)/(7), then what is the value of 2xy is (a) 3(b)4(c)6(d)9(e) None of these

If 4x-5y=37 and 3x-4y=25, then find the value of x-y.

If 2^(x) + 3^(y) = 17 and 2^(x+1)-3^(y+1)=5 then what is the value of x?

If 3x+5y=44 and 10x-2y=16 what is the value of x?

If 3x+5y =9 and 5x+3y=7, then find the value of x+y.