-4x +4 = -3x + 31
4 - 31 = -3x + 4x
-27 = x
Answer:
1.053 *10
^7
Hope this helps, you can look it up on google by the way ^^
The dilation factor Sophia is using appears to be
(image coordinate)/(original coordinate) = -9/-3 = 15/5 = 3
Then the problem tells us
(pre-image point)×3 = (3, 1)
so we conclude
(pre-image point) = (3, 1)/3 = (1, 1/3)
90-52=38
38=3x-5
3x=43
x=14.3
