Answer:
x = 4
Step-by-step explanation:
the dimensions of the small triangle to the large triangle are increasing by multiplying by 5.
5 times 5 equals 25
3 times 5 equals 15
so 4 times 5 equals 20
then, you have to solve the equation:
20 = 3x + 8
subtract 8 from both sides
12 = 3x
divide both sides by 3
12 divided by 3 equals 4
so x = 4
