Let's call the three numbers x, y, and z.
The numbers are 3, 12, and 5.
x + y + z = 20
y = 4x
x + z = 8
We can rewrite the first equation because y is 4x, so
x + 4x + z = 20
5x + z = 20
And now we can use simultaneous equation rules to solve
5x + z = 20
x + z = 8
5x + z = 20
5x + 5z = 40
(subtract)
-4z + -20
÷ -4
z = 5
x + z = 8
x + 5 = 8
x = 3
y = 4x
y = 4 × 3
y = 12
I hope this helps!
Answer:
the answer is 27
Step-by-step explanation:
for the show your work all you have to do is write 3x3x3=27
Answer:
its 22 <3
Step-by-step explanation:
a=bh
(area = base x height)
base = 5.5
height = 4
5.5 x 4 = 22 :)
Answer:
Change left = $81.50
Step-by-step explanation:
Total cost of 3 Tshirts = 3×39.50
= $118.50
To find the change
$200.00
- $118.50
= $81.50
