Step-by-step explanation:

[Taking a common from each term]


Hence,

The sum of the sides of a triangle is equal to 180º.
The three angles will be: 3x,4x and 5x.
we can suggest the following equation:
3x+4x+5x=180
12x=180
x=180/12
x=15
The angles would be:
3x=3(15)=45
4x=4(15)=60
5x=5(15)=75
Answer: the highest angle would measure 75º.
Answer:A and B. Step-by-step explanation: C) 9 7/8 - (- 2 4/5) - (- 1/2) = = 9 7/8 + 2 4/5 + 1/2 (F). D) - (- 9 7/8 + 2 4/5) - 1/2) =.
I hope this helped^.^
May i have brainliest? ^.^
Have a great day buddy! ~hailey
Y=-6-x is not equal to 2x+y=12. Both sides were not divided by two when it was simplified.