1. Rewrite the system:
x+12y=68 (i)
x=8y-12 (ii)
2. Let's substitute the equation (ii) into the equation (i):
x+12y=68
(8y-12)+12y=68
3. Then, you have:
8y-12+12y=68
4. When you clear "y", you have:
20y-12=68
20y=68+12
20y=80
y=80/20
y=4
5. You already have the value of "y". Now, you must substitute this value into the equation (ii):
x=8y-12
x=8(4)-12
x=32-12
x=20
6. Therefore, the result is:
x=20
y=4
1) p + 8
Substitute 2 in for the variable.
2 + 8 =

2) 3p
Substitute 2 in for the variable.
3(2) =

3) 16 - p
Substitute 2 in for the variable.
16 - 2 =

4) -12 ÷ p
Substitute 2 in for the variable.
-12 ÷ 2 =