<span>A mathematical sentence that contains one or more variables is sometimes called an open sentence.</span>
x = number
the equation to use is: 3x+4=28
3x+4=28
3x=24
x-24/3 =8
x=8
Answer:
-6
Step-by-step explanation:
y=-1/3(12)-2
=(-1/3x12/1)-2
=-4-2
y=-6
Yes, it depends on what kind of model
