The Y-Intercept of a line is the point where a line's graph intersects (crosses) the Y-axis. A y-intercept of 3 means that a line's graph intersects the Y-axis at the point (0,3). A y-intercept of -4 means that the graph of a line crosses the Y-axis at the point (0,-4).
Hey!
Let's start by writing the problem:

Subtract 7 from both sides.


Subtact 12x from both sides.


Divide both sides by -10.


Let me know if you have any questions regarding this problem!
Thanks!
-TetraFish
Answer:
Value of x = 19
Step-by-step explanation:
We know that in a parallelogram opposite sides are congruent.
So, in the given parallelogram side LM ≅ side NO
So, we can write 
Solving the equation to find value of x

So, value of x = 19
Answer:
12, 14, and 16
Step-by-step explanation:
Assume
1st number: x
2nd number: x+2
3rd number: x+4
(I'm adding 2 for each number because even numbers skip by 2)
The numbers add to 42, so
x+(x+2)+(x+4)=42
x+x+2+x+4=42
3x+6=42
3x=36
x=12
1st number: 12
2nd number: 12+2=14
3rd number: 12+4=16
12, 14, and 16