When I think of a number, double it, then add seven, I get 25. what number did I think of?
2 answers:
Answer:
9
Step-by-step explanation:
let the number be x
double it = x+x = 2x
then add seven = 2x+7
i get 25 2x+7= 25
subtract 7 from both sides
2x= 25-7= 18
2x= 18
x= 18/2 = 9
Answer:
9
Step-by-step explanation:
25-7=18
half of 18 is 9
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Step-by-step explanation:
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Answer:
x = t(a+p)/4
Step-by-step explanation
Given the expression
a=4x/t - p
We are to make x the subject of the formula
a=4x/t - p
Add p to both sides
a+p = 4x/t - p+p
a+p = 4x/t
Cross multiply
t(a+p) = 4x
Rearrange
4x = t(a+p)
Divide both sides by 4
4x/4 = t(a+p)/4
x = t(a+p)/4
Answer:
8
Step-by-step explanation:
<span>Find all pairs of consecutive even integers whose sum is greater than 73 but less than 79.
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