1 km = 0.62137... mile (rounded)
7 km = 4.3296... miles (rounded)
The answer is B
-8y + 7y = -y
When the signs are different, subtract and take the sign of the bigger number.
2x + 3/12 = 2x/8
2x - 2x/8 = -3/12
2x - x/4 = -3/12; 2 - 1/4 = 1 3/4 = 7/4
7x/4 = -3/12
7x = -3/12 * 4
7x = -1
x = -1/7
