Answer: -4009
Step-by-step explanation: hope this helps!
A is coefficient of x square
b is coefficient of x
and c is constant term in the polynomial
Get x on its own side
7+x-15=2 2/3
+15 +15
7+x=17 2/3
-7 -7
x= 10 2/3
Hope I helped
1m = 1000 mm
4m = 4 * 1000 = 4000mm