It seems like there are multiple parts to your input that relate to different equations or expressions. However, the way they are combined is unclear. I'll begin by analyzing the first part of your expression, which appears to be a linear equation:
Solve the equation \( -1.5x + 3.8 = -6.7 \)
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First, isolate the term involving \( x \): \[ -1.5x = -6.7 - 3.8 \] \[ -1.5x = -10.5 \]
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Next, solve for \( x \) by dividing both sides by -1.5: \[ x = \frac{-10.5}{-1.5} \] \[ x = 7 \]
Interpretation of Other Parts
For the rest of your expression, it seems like additional variables or terms are included (e.g., \( a, b, c, D \)), but it's not clear if they relate to the equation above or if they are separate items.
Could you please clarify what you would like to do with those additional terms? Are you looking for information on how to manipulate them or combine them in a certain way?