Look at the picture and you will get your answer.
Step 1) 2x-5y+x+y=2x+x-5y+y
step 2) 2x+x-5y+y=3x-4y
by putting together like terms you get the answer 3x-4y so your answer should be A
210 ÷ 6 = 35 miles to the gallon
280 ÷ 35 = 8 gallons for 280 miles
Answer:
The Number is -8.
Step-by-step explanation:
Let the number be x.
Now given:
A number decreased by twelve;
It means 12 is subtracted from the number.
Hence the equation can be framed as;
![x-12](https://tex.z-dn.net/?f=x-12)
Also given;
twice the opposite of ten
Opposite of 10 = -10
Twice the opposite of 10 means 2 is multiplied with opposite of 10.
Hence twice the opposite of ten = ![2\times-10=-20](https://tex.z-dn.net/?f=2%5Ctimes-10%3D-20)
Now A number decreased by twelve is twice the opposite of ten
framing it in equation form we get;
![x-12=-20](https://tex.z-dn.net/?f=x-12%3D-20)
Solving the above equation we get;
![x=-20+12\\x=-8](https://tex.z-dn.net/?f=x%3D-20%2B12%5C%5Cx%3D-8)
Hence the Number is -8.