Answer:
y = -6
Step-by-step explanation:
To calculate 'y', you need to do use reverse method. To be clear, you need to subtract -3.5 by 2.5, since 2.5 is adding to y to give -3.5.
y = -3.5 - 2.5
y = -6
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Re-check answer by replacing -6 with y
2.5 + -6 = -3.5
