Solve for x.|0.9x + 0.7| ? 1
A. -0.889 ? x ? -0.667
B. -0.333 ? x ? 1.889
C. -1.889 ? x ? 0.333
D. 0.667 ? x ? 0.889
Answer: C
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A. 
B. 
C. 
D. 