Answer:
B 17
Step-by-step explanation:
When you subtract a negative, the operation changes to addition.
9-(-8)
9+8
17
-hope it helps
Subtract 5x from both sides. You'll get 3x=15/2
Turn 15/2 into a mixed number. 7 1/2
Divide 3 both sides.
Answer: 2 1/2
Check your work.
5*2 1/2 =12.5 3*2 1/2= 7.5
Therefore 12.5+7.5=12.5+7.5
12.5+7.5=20
Therefore the answer is 2.5 or 2 1/2
K=4
add seven on both sides
2x-4y=7
add 4y on both sides
2x=7+4y
divide 2 on both sides
x=7+4y/2
plug that into original equation
2(7+4y/2)-4y-7=0
7 and 4y cancel out
2(2)=0
4=0
