First combine like terms
3x - 7 - 2x + 5 = 6
x - 2 = 6
Get x by itself by adding 2 on both sides
x - 2 = 6
x = 8
Your answer is x = 8
Answer:
the ratio of radius of a small circle and large circle is 3:8
-21.34
Since -64 isn't divisible by 3, the answer must be -21.34
5/16 is smaller. Isn't it ?