To solve the equation \(-1.5x + 3.8 = -6.7\), we can follow these steps:
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Subtract 3.8 from both sides: \[ -1.5x + 3.8 - 3.8 = -6.7 - 3.8 \] This simplifies to: \[ -1.5x = -10.5 \]
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Divide both sides by -1.5: \[ x = \frac{-10.5}{-1.5} \]
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Calculate the division: \[ x = 7 \]
Thus, the solution is: \[ x = 7 \]
Since this does not match any of the provided options (a: -5.5, b: 7, c: -4.2, d: 12), please check the original equation or options again. If the options include \(7\), then \(b\) is the correct answer.