A student chose a number, multiplied it by 2, then subtracted 138 from the result and got 102. What was the number he chose? Pick:
A) 110	B) 120	C) 130	D) 140	E) 150
Solution:   Let xx be the number he chose, then   2⋅x−138=102   2x=240   x=120   Answer 120
<result>B</result>
A student chose a number, multiplied it by 2, then subtracted 138 from the result and got 102. What was the number he chose?