SOLUTION: Solve for the variable in each equation below. Show all your work. Provide a check for each answer. If a solution is undefined, state that in your answer. .2x+0.5x=2 please sho

Algebra ->  Exponents -> SOLUTION: Solve for the variable in each equation below. Show all your work. Provide a check for each answer. If a solution is undefined, state that in your answer. .2x+0.5x=2 please sho      Log On


   

Question 876446: Solve for the variable in each equation below. Show all your work. Provide a check for each answer. If a solution is undefined, state that in your answer.
.2x+0.5x=2 please show me how to check your answer.....
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Solve for x to get


0.2x+0.5x=2


0.7x=2


x=2/0.7


x=2.857142857 (this is approximate)


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Check:


0.2x+0.5x=2


0.2(2.857142857)+0.5(2.857142857)=2 ... replace EVERY copy of x with 2.857142857


0.5714285714+1.4285714285=2


1.9999999999=2


Due to round off error, we're going to get very close to 2, so this practically confirms the answer.