Mathematics, 15.04.2020 22:30 kirathadoll

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 , both expressions have a value of 60.
When x = 2, both expressions have a value of 15, and when , both expressions have a value of 39.

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Which best proves why the expressions 4 (x + 3) + 2x and 6 (x + 2) must be equivalent expressions?