Your answer is
Here's how:
Step 1: Add 1 to both sides. 10x + 2y = 15 + 1
Step 2: Simplify 15 + 1 to 16. 10x + 2y = 16
Step 3: Factor are the common term 2. 2(5x + y) = 16
Step 4: Divide both sides by 2. 5x + y = 16/2
Step 5: Simplify 16/2 to 8. 5x + y = 8
Step 6: Subtract y from both sides. 5x = 8 - y
Step 7: Divide both sides by y. x = (8-y) / 5
This answer is if you want to solve for x! If you want to solve for y, let me know and I'll change my answer! Have a nice night!
Answer:
The number of a 10-oz cup of coffee was 6
The number of a 14-oz cup of coffee was 6
The number of a 20-oz cup of coffee was 5
Step-by-step explanation:
Let
x ----> the number of a 10-oz cup of coffee
y ----> the number of a 14-oz cup of coffee
z ----> the number of a 20-oz cup of coffee
we know that
-----> equation A
----> equation B
----> equation C
Using a equation System Solver (Wolfram Alpha)
The solution is
x=6, y=6, z=5
see the attached figure
therefore
The number of a 10-oz cup of coffee was 6
The number of a 14-oz cup of coffee was 6
The number of a 20-oz cup of coffee was 5
U do 3x3 then u get 9 then u do it again and u get 9 and multiply 9 by 9 and get 81
We use standard form to write a huge number in a 'small' form. In this case:
becomes
and finally
, because we move the decimal point 5 places to the left.