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Help If 40 - x < 3x, then the solution is.... A. x < 20 B. x > 20 C. x > 10 D. x < 10 Thanks!
asked
Mar 22, 2017
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Help
If 40 - x < 3x, then the solution is....
A. x < 20
B. x > 20
C. x > 10
D. x < 10
Thanks!
Mathematics
middle-school
Rahul Bharati
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Rahul Bharati
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2
Answers
3
votes
Solutions for
40 - x < 3x
To find the answer we have to solve the equation
40 - x < 3x.
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
1) The first step is to add x to each side
40 < 3x+x
2) Next you s
implify 3x+x. To simplify 3x+x you add the x to 3. 3x+x = 4x
40 < 4x
3)
Divide both of the sides by 4
< x
4)
Simplify the fraction
to 10. You simplify it to ten because 40 ÷ 4 = 10.
10<x
5) Answer
x= > 10
≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡≡
Now lets see the Choices
The correct choice is C.
x > 10
Michael Tabolsky
answered
Mar 24, 2017
by
Michael Tabolsky
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3
votes
40 - x < 3x
Simplify both sides of inequality:
−x
+ 40
<
3x
Subtract 3x on both sides:
−x
+ 40
−
3x
<
3x
−
3x
−
4x
+ 40
<
0
Divide both sides by -4:
-4x/-4 < -40/-4
x > 10
C. x > 10
Vikram Bodicherla
answered
Mar 25, 2017
by
Vikram Bodicherla
7.7k
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