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Question
Solve for x : 9x+2 = 720 + 9x
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Solution
9x+2 = 720 + 9x
⇒ 9x+2 - 9x = 720
⇒ 9x (92 - 1) = 720
⇒ 9x (81 - 1) = 720
⇒ 9x (80) = 720
⇒ 9x = 9
⇒ 9x = 91
⇒ x = 1
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