Answer:
B. 11
Explanation:
2a - 7 = 15
2a = 15 + 7
2a = 22
a = 22/2
a = 11
Check:
2*11 - 7 = 15
22 - 7 = 15
B) 11
Let n = a number
2n - 7 = 15 Add 7 to both sides
2n - 7 + 7 = 15 + 7
2n = 22 Divide both sides by 2
=
n = 11
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