Step 1. Multiply first equation with -3 and the second one with 2. You'll get:
Step 2. Add both equations together. You'll get:
, which gives x = -2
Step 3. Replace x = -2 in the first equation and calculate y.
The solution is: x=-2, y=5
6 cupcakes ----1/3 sugar, 2 1/2 dozen = 2*12+12/2=24+6=30
30 cupcakes ---x
x=(30*1/3)/6=10/6=1 4/6=1 2/3 cups of sugar
2b=C-3a
b=C-3a/2 , is the answer
Answer:
I would say it commutative property of addition
sorry if wrong
Step-by-step explanation:
If Rudy has $6, then Denise has $17, and Theo has $22, which equals $45