If 55x + 52x = 7710 find X
...If 55x + 52x = 7710 find X
5
6
7
10
Correct answer is C
5 × x1 + 5 × x0 + 5 × x1 + 2 × x0 = 77
(change all to base 10)
5x + 5 + 5x + 2 = 77
10x + 7 = 77
10x = 77-7
10x = 70
x = 70/10
x = 7
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