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V125BC [204]
3 years ago
12

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made.

Mathematics
1 answer:
Romashka-Z-Leto [24]3 years ago
8 0
In step one, you are supposed to add 25 to both sides, because if you just subtract, it would be -5x-50=53
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\text{The slope-intercept form of an equation of a line:}\\\\y=mx+b\\\\m-\text{slope}\\b-\text{y-intercept}\\\\\text{Let}\\\\k:y=m_1x+b_1\\l:y=m_2x+b_2\\\\k\ \perp\ l\iff m_1m_2=-1\to m_2=-\dfrac{1}{m_1}\\\\k\ ||\ l\iff m_1=m_2\\=========================

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