Question

Please help me .
Solve 3x - 4 = 7x + 9

x ≈ -25.86

x ≈ -2.59

x ≈ -0.39

x ≈ -0.04

Answer 1

x = - 13/4

Answer 2

Chances are that the problem is really \[\Large 3^{x-4}=7^{x+9}\]

Answer 3

yes its expontents sorry

Answer 4

i know right me too Lol.

Answer 5

this should help... http://www.wolframalpha.com/input/?i=3%5E%28x-4%29%3D7%5E%28x%2B9%29

Answer 6

Ohhh, with exponents duuh.

Answer 7

To solve this, use natural logarithms


\[\Large 3^{x-4}=7^{x+9}\]


\[\Large \ln\left(3^{x-4}\right)=\ln\left(7^{x+9}\right)\]


\[\Large (x-4)\ln\left(3\right)=(x+9)\ln\left(7\right)\]


\[\Large x\ln\left(3\right)-4\ln\left(3\right)=x\ln\left(7\right)+9\ln\left(7\right)\]


\[\Large x\ln\left(3\right)-x\ln\left(7\right)=9\ln\left(7\right)+4\ln\left(3\right)\]


\[\Large x\left(\ln\left(3\right)-\ln\left(7\right)\right)=9\ln\left(7\right)+4\ln\left(3\right)\]


\[\Large x=\frac{9\ln\left(7\right)+4\ln\left(3\right)}{\ln\left(3\right)-\ln\left(7\right)}\]


\[\Large x\approx-25.85589028\]

Answer 8

Thank you so much . (:

Answer 9

yw