Question

Jade wants to verify that the expression 5(3x – 6) is equivalent to 15x – 30. she substitutes 2 into each expression and evaluates each one. how will she know if 5(3x – 6) is equivalent to 15x – 30?

Answer 1

At first, weIf assumed that the two expressions are equal and then we can write the following and solve for x
5(3x-6)=15x-30
Then perform transposition method such as shown below
15x-30=15x-30
15x-15x=-30+30
0=0
They are equal since the derived values on both sides is the same which is zero.