Respuesta :

choixongdong
10a+35b=0; 21a-35b=217 ...associative property of addition
31a = 217 .............addition property of equality
a = 7 .....................division property of equality
2(7) +7b = 0 --------------substitution property of equality
14+7b = 0 -----------------mulplication property of equality
      7b = -14 --------------subtraction property of equality
        b = -2 ----------------simplify
Astute
Hey there,

1.) [tex]\boxed{associative \ property \ of \ addition}[/tex

2.)[tex]\boxed{addition \ property \ of equality}[/tex]
And the rest would be. . . 

division property of equalitysubstitution property of equalitymultiplication property of equalitysubtraction property of equalitysimplify

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