Answer:
x=3
Step-by-step explanation:
Sub y=x-1 into 2x+y=8.
You will get 2x+x-1=8.
Simplify 3x-1=8
Solve 3x=9
x=3
Answer:
$0.3 per cookie
Step-by-step explanation:
a dozen is 12 cookies. 2*12 = 24.
7.20/24 = 0.3
so each cookie costs 0.3 dollars
35
Step-by-step explanation:
You could make them have the same denominator, making it 7/10-5/10=2/10.
The answer is 2/10, or simplified, 1/5.