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Charra [1.4K]
3 years ago
6

class="latex-formula">




Free
Mathematics
2 answers:
sergij07 [2.7K]3 years ago
5 0

\sf \longmapsto \: 2x  +  21 = 3

\sf \longmapsto2x = 3 - 21

\sf \longmapsto2x =  - 18

\sf \longmapsto \: x =  \frac{ - 18}{2}

\sf \longmapsto x =  - 9

grigory [225]3 years ago
3 0

Answer:

\sf 2x+21=3

\sf 2x+21-21=3-21

\sf 2x=-18

\sf \cfrac{2x}{2}=\cfrac{-18}{2}

\boxed{\sf x=-9}

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