Answer:
x = 18 or x = -12.
Step-by-step explanation:
||x-3|-5| = 10 only if |x-3|-5 = 10 or |x-3|-5 = -10, i.e., if |x-3|=15 or |x-3|=-5; but |x-3| cannot be equal to -5, because |x-3| should be a non-negative value. Therefore, the first equation is true only if |x-3|=15. |x-3| = 15 only if x-3 = 15 or x-3 = -15, i.e., x = 18 or x = -12. We can verify this in the following way: ||18-3|-5|=||15|-5|=|10|=10 and ||-12-3|-5|=||-15|-5|=|15-5|=|10|=10. This verify that our solution is correct.
Answer:
A. 810
Step-by-step explanation:
All you need to do here is add the number of children between ages 0-10 and children of ages between 10-20.
500+310= 810
Hope this helps! :)
Answer
X = 8
Step-by-step explanation:
1x - 2 = 6
1x = 6 + 2
1x = 8 (divide both sides by 1 to get x)
1x/1 = 8/1
x = 8
Answer:
Multiply the second equation by 2
Step-by-step explanation:
Given
Required
Get matching coefficient for elimination
The coefficient of x in both expressions are factors.
So, we can multiply the second equation by 2 to get the coefficient of x in the first.
i.e.
So, the system becomes:
<em>Now, x can be eliminated</em>
