Seudónimo Seudónimo 08-04-2020 Mathematics contestada Which pairs of expressions are equivalent? more than one answer 3x + 5x and 8x 3(x + 4) and 3x + 12 a + b + a and 2a + b 18x + 2y and 15x + 3x + 2x 3a + 4a + 10 and 17a