Question

When 2 less than a number n is increased by 70%, the result is 8.5.

Answer 1

I know its n-2 __=8.5

Answer 2

i dont know the rest

Answer 3

70/100

Answer 4

(n-2)*1.75=8.5

Answer 5

isnt it .70

Answer 6

(n-2)*1.70=8.5

Answer 7

ok

Answer 8

then how do u solve for n

Answer 9

im sorry i got moved to honors 8th grade math and im new to this

Answer 10

n=8.5/1.7 + 2

Answer 11

what?

Answer 12

1) First write "two less than a number n"
That is written as ( n - 2 )

2) Now write "70% of that amount"
That is written as 0.7( n - 2 )

These two amounts add up to 8.5
( n - 2 ) + 0.7 ( n - 2 ) = 8.5

To solve for n:
1) Get rid of the decimal by multiplying all the terms on both sides by 10
After you have multiplied, you will have this:
10 ( n - 2 ) + 7 ( n - 2 ) = 85

2) Clear the parentheses by distributing the 10 and the 7
After you have distributed, you will get this:
10n - 20 + 7n - 14 = 85

3) Combine like terms
After you combine 10n with + 7n, and after you combine - 20 with - 14, you will have:
17n - 34 = 85

4) Add 34 to both sides to isolate the 17n term, like this:
17n = 119

5) Divide both sides by 17 to isolate n
n = 7 <-- answer

Answer:
n = 7

Answer 13

Check
Replace n in the original equation with 7
( n - 2 ) + 0.7 ( n - 2 ) = 8.5
( 7 - 2 ) + 0.7 ( 7 - 2 ) should also equal 8.5
5 + 0.7x5 should equal 8.5
5 + 3.5 should equal 8.5
8.5 does equal 8.5
Check