<span>-17-2x=6-x
-2x + x = 6 + 17
-x = 23
x = -23</span>
Supplementary Angles:

Arithmetically speaking, the closest 2 supplementary angles can get (in 3 and 2 digits respectively) is the upwritten.
Complementary Angles:

Simply, in this case, for angles to be numerically as close as possible - make both the angles 45°.
The answer is 60 (wow this was a fast answer wish people answered my questions this fast)
<span>4300 / 2 = 2150
Just simply divide</span>
Well, 217 miles ÷ 62 MPH is 3.5.
so it took the train 3.5 hours.
check it: 62 MPH x 3.5 hours, it went 217 miles