The number sentence would be 8+9=17 because commutative property is when you just switch around the numbers but get the same answer.
Answer:
x = 4. (Answer B)
Step-by-step explanation:
Combine the x-terms on the left side: -x + 3x = 2 + 6.
Simplifying further, 2x = 8, or x = 4. (Answer B)
Answer:
First question is B
Second question is also B :)
Step-by-step explanation:
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