0.06 - 0.10(x+1) = - 0.2

Question

I got 9 and 3 but the but the answer is 8/5. how do u do it?

Answer 1

If you multiply both sides by the value of 100 you can have whole numbers that will make this problem a little easier to look at.

100*(0.06 - 0.10(x+1)) = 100*(-0.2)

6 - 10(x+1) = -20

now multply the 10 across the (x+1) term

6 - 10x - 10 = -20

now add the 6 and -10 on the left side of the equation

-10x - 4 = -20

add 4 to the right side of the equation

-10x = -16

divide by -10

x = 16/10 or if you divide 2 out of each of these values you will get 8/5 like you mentioned in your question

 

Hope this helps!

Answer 2

Multiply both sides by -10,

-0.6 + (x+1) = 2

Isolate x,

x = 2+0.6-1 = 1.6 = 8/3 <==Answer