The equation would be -9+-9 = -18
Answer:
i think 3.5 gallons per week
Step-by-step explanation:
15 gallons every 30 days
x gallons per weeks (7 days)
15×7 = 30x
105 = 30x
105/30 = x
3.5 = x
answer as a mixed number in simplest form = 3 1/2
Try it.
8 =? 2*8 - 4
8 =? 16 - 4
8 =? 12
8 is not a solution of the original equation
Try 4
4 = 2*4 - 4
4 = 8 - 4
4 = 4 and yes 4 works.
4 is unique. No other solution will work.
Answer:
x=-6
Step-by-step explanation:
x-(-9)=3
x+9=3
x+9-9=3-9
x=-6
I hope this helps!