The root is 10 because 2x5 is 10 so that’s ur answer
3x = -212
x = 70.66667
And this is assuming it equals to zero.
Answer:

Step-by-step explanation:
Given:

To find: value of 
Solution:
Cross-multiplying is a method in which the numerator of each (or one) side is multiplied by the denominator of the other side.

On cross-multiplication, the equation becomes 

Divides both sides by 8

Im not too sure so dont take my word.
But if you're rounding the fraction to half or whole.
I would round down from 8/14 , to 7/14.
Which 7/14 simplified is 1/2
Your answer is 7/14 i believe
Answer:
7.782352941
Step-by-step explanation:
4.2 divided by 1.02 the multiply the out come of that by 1.89 to get 7.782352941