The answer is D) 12
8x +14=9x+12
8x+12=9x
12=1x
x=12
Steps:
1. Do 19 + -23= -4
2. Do -48 + -80= -128
3. Do -17 + 20= 3
4. Your answers are -4, -128, and 3
The answer is 1 and 2/3. 5/3 means 5 divided by 3. 5 goes into 3 once so the whole number is one. There is then 2 left so you are left with 2/3. 2 doesn't go into 3 so you leave it like that. This makes the answer 1 and 2/3 because 1 is the whole number and 2/3 is the unit fraction.