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Answer:
D) - 2.2y - 1.8
Step-by-step explanation:
Given expression;
1.2y + 4.5 - 3.4y - 6.3
simplify the expression by collecting like terms
= (1.2y - 3.4y) + (4.5 - 6.3)
= -2.2y - 1.8
Therefore, the correct option is D.
D) - 2.2y - 1.8