Answer:
18
Step-by-step explanation:
12×1.5=18
its the same formula with rectangle cz if you combine both right angled triangle side its become a rectangle
8
-4x+8+2x
2x+8
compare both sides
2x+__= 2x+8
it is 8
x=7, x=3
positive
negative
7 hundredths
add 4 to 6 and take away 3