I'm not sure the equation is written correctly but the measure of the given angle is 126 degrees. In this instance, the variable in 3x (x) would be equal to 42. Hope this helped.

180-54= 126

126 / 3 = x

x = 42

:)

**Answer:**

5

**Step-by-step explanation:**

Salma and Jared each threw 5 darts at the target shown. Salma scored 19 points by landing 2 darts in A and 3 in B. Jared scored 17 points by landing 1 dart in A and 4 in B. How many points are given for a dart landing in A?

this can be solved using simultaneous equation. Two equations can be formed from the question

2a + 3b = 19 equation 1

1a + 4b = 17 equation 2

Multiply equation 2 by 2

2a + 8b = 34 equation 3

Subtract equation 1 from 3

5b = 15

divide both sides of the equation by 5

b = 3

Substitute for b in equation 1

2a + 3(3) = 19

2a = 9 = 19

collect like terms

2a = 10

divide both sides of the equation by 2

a = 5

**Answer: BC=18**

**DG=6**

**Step-by-step explanation: well we have to use similarity. and that means setting up proportions so... 15/10 = BC/12 10BC=180, BC=18 **

**9/18=DG/12 (we put 18 because it equals BC)**

**hope this helped!!**