Yes it is a stirght line sory dont know how to so yeah it is supplementary
Answer:
x=10,-4
Step-by-step explanation:
Move all of the terms to the left and then set x to zero . Then set each factor equal to zero .
1st step. Calculate the area of the parallelogram
We can use the following formula:

where,
base, b = 9 km
height, h = 5 km
Therefore,

The area of the parallelogram is 45 km^2
2nd step. Calculate the area of the triangle
Let's use this formula:

where,
base, b = 6 km
height, h = 3 km
Therefore,

The area of the triangle is 9 km^2
3rd step. calculates the ratio of the area of the parallelogram to the area of the triangle

Answer: the area of the parallelogram is 5 times greater than the area of the triangle.
Easy it's like regular subtraction
-2 -2=-4 if it's the same sign you add
-2+4=2 different is subtract