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24-02-2020
Mathematics

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Double the sum of a number and three is the same as the number subtracted by nine

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gmccormick67 gmccormick67

25-02-2020

Answer:

2(n+3) = n-9

Step-by-step explanation:

2(n+3) = n-9

Step 1: Multiply (n+3) by two; 2n + 6

Step 2: Subtract n on both sides; n+6= -9

Step 3: Subtract 6 on both sides; n= -9 - 6

Step 4: Add -9 and -6; -15

Solution: n= -15

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