Question

i am having problem in this question plz help

Answer 1

7+3x
x=-7/3
3(-7/3)^3+7(-7/3)
-343/9-49/3
-343-147/9
-490/9

Answer 2

$<marquee>HELLO!</marquee>$

$\: = > \: 7 \: + 3x \:$




$\: = > \: x = \frac{ - 7}{3}$



$\: \: = > \: 3( \frac{ - 7}{3} ) \: 3 + 7( \frac{ - 7}{3} )$



$= > \frac{ - 343}{9} \: - \: \frac{49}{3}$



$= > \: - 345 \: \frac{ - 147}{9}$



$= \: > \frac{ - 409}{9}$



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