3^x+2 + 3^x+1 + 3^x = 39 HELP!!

Question

3^x+2 + 3^x+1 + 3^x = 39 HELP!!

Answer 1

3ˇ(x+2)+3ˇ(x+1)+3ˇx =39
3ˇx.3ˇ2 +3ˇx.3ˇ1+3ˇx=39
9.3ˇx+3.3ˇx+3ˇx=39
13.3ˇx=39
3ˇx=3
3ˇx=3ˇ1
x=1
===
( 3ˇ3+3ˇ2+3ˇ1=27+9+3=39)

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