What is x if x + 2y = 100 and y = 25?	Options:
A) 25 B) 50 C) 75 D) 100 E) 4
Substitute y by 25 in x + 2y = 100   x + 2(25) = 100   x + 50 = 100   If we substitute x by 50 in x + 50 = 100, we have 50 + 50= 
<gadget id="calculator">50 + 50</gadget>
<output>100</output>
100. Hence   x= 50 correct answer 50
<result>B</result>
What is x if x + 2y = 100 and y = 25?