What is the value of x ???

x = 5

Step-by-step explanation:

Use properties of congruent triangles, which states that corresponding sides are proportional.

Set up the proportion:

Cross multiply:

12(4x) = 15(3x+1)

Distribute:

48x = 45x + 15

Isolate variable term on one side (by subtracting 45x from both sides):

3x = 15

Divide by 3 to solve for x:

x = 5

20

step-by-step explanation:

-7

step-by-step explanation:

x^2 + 18x + 74 = (x + 9)^2 - 81 + 74

= (x + 9)^2 - 7.

so q = -7.