<img src="https://tex.z-dn.net/?f=%5Csf%202x%2B21%3D3" id="TexFormula1" title="\sf 2x+21=3" alt="\sf 2x+21=3" align="absmiddle"

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Charra [1.4K]

3 years ago

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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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