9 = 2(6) - b
9 = 12 - b
-3 = b
Answer:
1. 8
2. 0.49
3. 7
4. 0.52
5. 0.43
6. 28
Step-by-step explanation:
I did the math you are welcome.
1. Observe the problem
2. Make a system of linear equations
x is pens
y is pencil
As stated in the text, x=2y
x=2y
7x+12y=6.50
Using substitution,
7(2y)+12y=6.50
14y+12y=6.50
26y=6.50
y=0.25
Substituting it back into the first equation:
x=2(0.25)
<h2><u><em>
x=0.5</em></u></h2><h2><u><em>
y=0.25</em></u></h2>
Answer:
helpme
Step-by-step explanation: