joyee joyee
  • 18-06-2014
  • Mathematics
Answered

For what values of x is the following equation satisfied : 3x+9 = 21+7x ?

Answer :

konrad509
konrad509 konrad509
  • 18-06-2014
[tex] 3x+9 = 21+7x\\ 4x=-12\\ x=-3[/tex]
Answer Link
AL2006
AL2006 AL2006
  • 18-06-2014
First of all, the first power of 'x' is the highest power in the whole equation,
so we only expect one solution.

You said that 3x+9 = 21+7x

Subtract 3x from each side:

9 = 21 + 4x

Subtract 21 from each side:

-12 = 4x

Divide each side by 4 :

-3 = x



Answer Link

Other Questions

A result of the atomic bombs dropped by the US on the Japanese cities of Hiroshima and Nagasaki was that A Japan surrendered within a few days B Japan continued
Which element must be present in an organic compound1 hydrogen 3 carbon2 oxygen 4 nitrogen
56 16 in simplest form
Round 198 to the nearest ten and hundred
Write 028 as a fraction in simplest form
5 oclock minus 1 hour and 15 minutes
Can the sum of two mixed numbers like 7 912 2 1112 be equal to 2 please help me i am in 4th grade i do not understand FRACTIONS
Which term defines a power equally shared by state and federal governments
three is twentyone divided by the sum of a number and five
How many pounds does a cheetah eat per day