d = 109.3
Step 1: Add 21.4 to both sides of the equation.
d - 21.4 + 21.4 = 87.9 + 21.4
Step 2: Simplify the equation.
d = 109.3
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
d−21.4=87.9
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