Answer:
D?
Step-by-step explanation:
Answer: A=20
Step-by-step explanation:
3×A=30+30............eqn 1
3A=60
A=60/3
A=20
Substitute A=20 into equation 1
3x20= 30+30
The answer is subtract two from both sides. Explanation: because it males the equation even and easier to solve.
Since the sum of the angles of a triangle is 180 degrees, we simply have to add all the angles and equate it to 180 to solve for x. So:100 + 12x + 4 + 14x - 2 = 18026x = 78x = 3
So, x is equal to 3.
Answer:
A
Step-by-step explanation:
.
