radomes.openskiesproject.org
Anonymous Anonymous
  • 24-01-2017
  • Mathematics
Answered

Solve each of the following equations


a.3x+4=21

b.2x-13=3x+18

c.6/15=3/x

Verified Answer :

Moskid
Moskid Moskid
  • 24-01-2017
A3x+4=21
    3x=21-4
    3x=17
      x=17÷3
      x= 5.7

Answer Link
apologiabiology
apologiabiology apologiabiology
  • 24-01-2017

remember you can do ANYTHING to an equation as long as you do it to both sides


a.
3x+4=21
minus 4 both sides
3x=17
divide both sides by 3
x=17/3

b.
2x-13=3x+18
minus 2x both sides
-13=x+18
minus 18 both sides
-31=x

c. 6/15=3/x
times both sides by 15x
6x=3*15
6x=45
divide both sides by 6
x=45/6
x=15/2




a. 17/3
b. -31
c. 15/2

Answer Link

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