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To solve the equation, we can isolate the variable by multiplying both sides of the equation by 2.9.
Multiply both sides of the equation by 2.9:
2.9 * (-x/2.9) = -3 * 2.9
The 2.9's on the left side will cancel out, leaving us with:
-x = -8.7
Now we can solve for x by multiplying both sides of the equation by -1:
(-1)(-x) = (-1)(-8.7)
This results in:
x = 8.7
Therefore, the solution to the equation is x = 8.7.