SOLUTION: HELP, HELP!!!!!! Solve each equation. round to the nearest 3 places: 1) logx 64 = -3 2) 8^6x+3 = 4 3) 5^x = 3^x+2 4)e^1-2x = 4

Algebra ->  Logarithm Solvers, Trainers and Word Problems -> SOLUTION: HELP, HELP!!!!!! Solve each equation. round to the nearest 3 places: 1) logx 64 = -3 2) 8^6x+3 = 4 3) 5^x = 3^x+2 4)e^1-2x = 4       Log On


   

Question 76445: HELP, HELP!!!!!! Solve each equation. round to the nearest 3 places: 1) logx 64 = -3 2) 8^6x+3 = 4 3) 5^x = 3^x+2 4)e^1-2x = 4
Answer by Edwin McCravy(20060) About Me  (Show Source):
You can put this solution on YOUR website!
Solve each equation. round to the nearest 3 places: 1) logx 64 = -3 2) 8^6x+3 = 4 3) 5^x = 3^x+2 4)e^1-2x = 4
1) logx64 = -3
x%5E-3+=+64
1%2Fx%5E3+=+64
1+=+64x%5E3
1%2F64+=+x%5E3
root%283%2C1%2F64%29+=+root%283%2Cx%5E3%29
1%2F4+=+x

2) 8%5E%286x%2B3%29+=+4
+%282%5E3%29+%5E%286x%2B3%29=2%5E2
2%5E%283%286x%2B3%29%29=+2%5E2
2%5E%2818x%2B9%29=+2%5E2
18x%2B9+=+2
18x+=+2-9
18x+=+-7
x+=+-7%2F18

3.
5%5Ex+=+3%5E%28x%2B2%29

ln%285%5Ex%29+=+ln%283%5E%28x%2B2%29%29
x%2Aln%285%29+=+%28x%2B2%29%2Aln%283%29
x%2Aln%285%29+=+x%2Aln%283%29+%2B+2%2Aln%283%29
x%2Aln%285%29+-+x%2Aln%283%29+=+2%2Aln%283%29
x%2A%28ln%285%29-ln%283%29%29+=+2%2Aln%283%29
+x+=+%282%2Aln%283%29%29%2F%28ln%285%29-ln%283%29%29
x+=+4.301320206
4)e%5E%281-2x%29+=+4
1-2x=ln%284%29
1-ln%284%29+=+2x
%281-ln%284%29%29%2F2=x
-.1931471806
Edwin