Mathematics: Quiz: Expressions and Equations Which value of n makes the equation 6.4n - 1.2 + 3n + 8.2 = 19.22 true? On=1.3 On = 2.9 O n=-8 On = 11

Quiz: Expressions and Equations Which value of

Ответ:

talanna394

27.08.2020

On=1.3

Step-by-step explanation:

$6.4n - 1.2 + 3n + 8.2 = 19.22 \\\mathrm{Group\:like\:terms}\\6.4n+3n-1.2+8.2=19.22\\\\\mathrm{Add\:similar\:elements:}\:6.4n+3n=9.4n\\9.4n-1.2+8.2=19.22\\\\\mathrm{Add/Subtract\:the\:numbers:}\:-1.2+8.2=7\\9.4n+7=19.22\\\\\mathrm{Multiply\:both\:sides\:by\:}100\\9.4n\times\:100+7\times\:100=19.22\times\:100\\\\Refine\\940n+700=1922\\\\\mathrm{Subtract\:}700\mathrm{\:from\:both\:sides}\\940n+700-700=1922-700\\\\Simplify\\940n=1222\\$