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Solving for ‘x’ in Exponents

[poll id=”52″]

ANSWER: A. 2.2

Begin by finding a common base root. Left side is 3^1(x-3) ; right is 3^2(3x-7). The 3’s cancel out on both sides, and you have: 1(x-3)=2(3x-7). Simplifying gives:

x-3=6x-14

-3=5x-14

11=5x

x=2.2