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which best proves why the expressions 4(x+3)+2x and 6(x+2) must be equivalent expressions?
when x-3, both expressions have a value of 30.
when x-5, both expressions have a value of 42.
when x= 1, both expressions have a value of 18, and when x=8, both expressions have a value of 60.
when x = 2, both expressions have a value of 15, and when x=6, both expressions have a value of 39.