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7n - 4 (8n+4) = 159
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2 votes
7n - 4 (8n+4) = 159

User BreakHead
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1 Answer

5 votes

Answer:

n = -7

Explanation:

Use distributive property:

7n - 32n - 16 = 159

Combine like terms

-25n - 16 = 159

Add 16 to both sides to isolate variable n

-25n = 175

Divide both sides by -25 to isolate variable n

n = -7

Check your work:

7(-7) - 32(-7) - 16 = 159

-49 + 224 - 16 = 159

159 = 159

User Ifthenelse
by
4.2k points
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