![JamesLachoneus](/avatars/29688.jpg)
JamesLachoneus
20.10.2019 •
Mathematics
:
solve for a.
4 1/5a -2.2 = -1 4/5a+ 3.8
show work!
Solved
Show answers
More tips
- F Food and Cooking What age is appropriate for giving your child cocoa?...
- A Auto and Moto How to Start a Diesel Engine in Cold Weather?...
- F Family and Home How to Remove Tar Stains: Tips and Recommendations from Experts...
- F Family and Home How to Remove Fading from Clothes: Tips and Tricks...
- S Sport How to Do a Jumping Split...
- H Health and Medicine How Did Inna Lose Weight on Dom 2?...
- F Family and Home How to Properly Fold Napkins in a Napkin Holder?...
- F Food and Cooking How to Set Up Ventrilo - The Ultimate Guide...
- S Science and Technology How to Make a Homemade Smoker: The Ultimate Guide...
- A Auto and Moto Battle for the Relocation of The Cherkizovsky Market: Who Won?...
Answers on questions: Mathematics
- M Mathematics 5acb/3z =10abc/12x Pls help...
- M Mathematics Tina and Marianne each play tennis. Marianne has won 5 more games than Tina. Is it possible for Tina to have won 12 games if the sum of the games Marianne and Tina have one together...
- M Mathematics I need to know how to simplify expressions. Specifically decimal expressions for example 18.18 + 22.74...
- M Mathematics If John read 8 pages in 10 minutes, how many pages can he read in 70 minutes?...
- M Mathematics How many squares would be in the seventh pattern...
- M Mathematics Help me please i don’t get it...
- M Mathematics Which of the following shows the relationship of parts? Diagram Chart Schematic Graph...
- M Mathematics 10. What is an equation for the line parallel to y=-x+ 7 that passes through (7,-2)?...
- M Mathematics Subract 6a-4b+3c from the difference between 14a+3b-6c and 7a-2b-10c...
- M Mathematics Neil has already prepared 3 kilograms of dough and will continue preparing 1 kilogram of dough every hour. How many hours does Neil need to work to prepare 15 kilograms of dough?...
Ответ:
4 1/5a=4.2a So,
4.2a-2.2=2a
-1 4/5a+3.8=
-1 4/5a=-1.8a So,
-1.8a+3.8=+5.6
I think that is it!
Ответ:
Since we want to solve for the variable x, we want to isolate x
a²x + (a - 1) = (a + 1)x ⇒ Distribute x to (a+1). Also, remove parentheses
a²x + a - 1 = ax + x ⇒ Subtract a from both sides
a²x - 1 = ax + x - a ⇒ Add 1 to both sides
a²x = ax + x - a + 1 ⇒ Subtract (ax + x) from both sides
a²x - (ax + x)= ax + x - a + 1 - (ax+x) ⇒ Simplify. Remember that multiplying positive by negative = negative
a²x - ax - x = ax + x - a + 1 - ax - x ⇒ Simplify
a²x - ax - x = -a + 1 ⇒ Factor out the x from a²x - ax - x
x(a² - a - 1) = -a + 1 ⇒ Divide both sides by (a² - a - 1)
x = (-a + 1) / (a² - a - 1)
However, we need to make sure that the denominator does not equal 0. Therefore, you set the denominator = 0 (just use the quadratic formula for this), and it gives that the denominator =0 when a = (1+√5)/2 AND (1-√5)/2
Therefore, the final answer is
x = (-a + 1) / (a² - a - 1) given that a ≠ (1+√5)/2, a ≠ (1-√5)/2