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justifying equations

step reason
3(x +4)= 18 given
3(x +4)= 18 to 3x +12= 18 distributive property
3x +12= 18 to 3x + 12 - 12 = 18 - 12 S.P.O.E.
3x + 12 - 12 = 18 - 12 to 3x + 0 = 18 - 12 additive inverse
3x + 0 = 18 - 12 to 3x = 18 - 12 additive identity
3x = 18 - 12 to 3x = 6 numerical subtraction
3x = 6 to 3x/ 3 = 6/3 D.P.O.E.
3x/ 3 = 6/3 to 1x= 6/3 multiplicative inverse
1x= 6/3 to x= 6/3 multiplicative identity
x= 6/3 to x=2 division
Created by: amuhlstock
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