Answer:
top one is 0.6 bottom one is 0.1
2x + 4 = 3x - 10
-2x and +10 to both sides
14 = x
the answer is x = 14
The length can be found using the Pythagorean Theorem...
c^2=a^2+b^2 and in this case:
d^2=(dx^2)+(dy^2)
d^2=(3-7)^2+(12-9)^2
d^2=-4^2+3^2
d^2=16+9
d^2=25
d=5
So the length of AB=5 units.
