108k views
8 votes
Find x if f(x)=2x+7 and f(x)=-1

User Enderskill
by
6.3k points

1 Answer

6 votes

Answer:


x = -4

Explanation:


~~~~~~f(x) = -1\\\\\implies 2x +7 = -1\\\\\implies 2x = -1 - 7\\\\\implies 2x = -8 \\\\\implies x = -\frac 82 \\\\\implies x = -4

User Hendi
by
6.6k points
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