Answer:
X=5
AB=13
BC=17
Step-by-step explanation:
So first you add the two equations together and the total will have to be 30.
So, 2x+3-4x-3=30
Simplified 6x=30
x=5.
2x+3 -> 5 times 2 + 3
4x - 3 -> 5 times 4 - 3
AB + BC = AC
2x +3 + 4x - 3 = 30
2x + 4x + 3 - 3 = 30
Combine like terms
6x = 30
Divide both sides by 6
x = 30/6
x = 5
AB = 2x + 3 = 2*5 + 3 = 10 + 3
AB = 13
BC = 4x - 3 = 4*5 - 3 = 20 - 3
BC = 17
