Question

What is the property that justifies the statment 16m=160, then m=10

Answer 1

.) TRAnsitive; think like aTRAin. the cars are connected... 
N is connected to X and X is connected to C, so N is connected to C 
2)reflexive; think refection, like a mirror, 
3)substitution; substituted 40 for mB 
4)division prop of eq; both sides of equation divided by 4 
5)AB = 25 - CD; subtracted CD from both sides