reafansmith reafansmith 16-02-2021 Mathematics contestada Select all the expression that are equivalent to 3x + 9 + 3x + 9 A : 3( 2x + 3) B: 3(2x + 6) C: 2( 3x + 9) D: 6(x +3 ) E: 6( x + 18) F: 2(4x +16)