Answer:
84
Explanation:
Use the correct order of operations, and do one operation at a time.
Write each full step to avoid mistakes.
85 – 20 ÷ (30 - 20) × 8 + 15 =
= 85 – 20 ÷ 10 x 8 + 15
= 85 – 2 x 8 + 15
= 85 – 16 + 15
= 69 + 15
= 84
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