B
since both equations express y in terms of x we can equate the right sides
2x + 7 = 25 - x ( add x to both sides )
3x + 7 = 25 ( subtract 7 from both sides )
3x = 18 ( divide both sides by 3 )
x = 6
substitute x = 6 into either of the 2 equations for y
y = 2x + 7 = ( 2 × 6 ) + 7 = 12 + 7 = 19
solution is (6, 19 )