Identify the property that justifies each step asked about in the answer area below. Line 1:
(-2x + 10) + 7x

Line 2:
(10 + (-2x)) + 7x

Line 3:
10 + (-2x + 7x)

Line 4:
10 + 5x

Line 1 to Line 2:
Line 2 to Line 3:

the f

last graph i believe

step-by-step explanation:

worked it out i believe

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this