THE CORRECT ANSWER IS (B).SUBTRACT Y FROM BOTH SIDES.SQUARE BOTH S...

45. The correct answer is (B).Subtract y from both sides.Square both sides.y + 5 = (7 – y)

²

= 49 – 14y + y

²

Subtract (y + 5) from both sides,Substituting in the original equation, we see that only y = 4 checks.Another method would be to substitute each answer choice into the original equation and see whichone works.