Question

will give medal !! please help me !
1) Theproperty demonstrated in the following equation is (2x-4y) 3+5z =6x-4y +5z
a)the reflexive property of equality
b) the distributive property
c) the two sides of the equation are not equal.
d) the substituion property of equality

2)the first step to solving the equation 3(x+7) =12x-51 is to ?
a) combine like terms
b) add the opposite to both sides
c) distribute
d) none of the above