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35 votes
35 votes
Halle el valor de x si : 1 + 3 + 5 + 7 +...+ (2x – 7) = 144

A) 15
B) 20
C) 14
D) 24

User TheSoulkiller
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1 Answer

24 votes
24 votes
Lets start with PEMDAS. For the numbers in the parentheses, we need to subtract 2x-7 to get -5. Now the equation is 1+3+5+-5x=144 since there are no exponents, multiplications, division, we need to add. 1+3=4. 4+5=5 and 5+-5x=0x. Now we have 0x=144. Then you need to divide
User SQRCAT
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