1000+38x=-900+40=

To solve the equation \(1000 + 38x = -900 + 40\), first simplify the right side:

\[ -900 + 40 = -860 \]

Now the equation becomes:

\[ 1000 + 38x = -860 \]

Next, subtract \(1000\) from both sides:

\[ 38x = -860 - 1000 \]

This simplifies to:

\[ 38x = -1860 \]

Now, divide both sides by \(38\) to solve for \(x\):

\[ x = \frac{-1860}{38} \]

Calculating that gives:

\[ x = -49 \]

So the solution is:

\[ \boxed{-49} \]