120657Step-by-step explanation:
2eˣ - 7 = 21
2eˣ = 28
eˣ = 14 How do we isolate for x now? Well we know that aˣ=b can be converted to
.
x =
A shorthand for "log base e" is the natural log (ln).
x = ln(14)
x = 2.64 approx.
Exact answer: ln(14)
Approximation: 2.64
This problem is tough until you clean it up so you can see what's going on.
On the left side, (7 + 5 - 3) = 9 . So the left side is x + 9 .
On the right side, (16 - 8) = 8.
So the equation is really <u>x + 9 = 8</u>
Subtract 9 from each side: <em> x = -1</em>