Answer:
x = 126
Step-by-step explanation:
-[tex]\frac{2}{7}[/tex]x - [tex]\frac{8}{21}[/tex]x + [tex]\frac{1}{3}[/tex]x = -42
-[tex]\frac{2}{7}[/tex]x (multiply numerator and denominator by 3)
-[tex]\frac{6}{21}[/tex]x
[tex]\frac{1}{3}[/tex]x (multiply numerator and denominator by 7)
[tex]\frac{7}{21}[/tex]x
-[tex]\frac{6}{21}[/tex]x - [tex]\frac{8}{21}[/tex]x + [tex]\frac{7}{21}[/tex]x = -42
-[tex]\frac{7}{21}[/tex]x = -42 (multiply everything by -21)
7x = 882 (divide everything by 7)
x = 126
