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42 + 42 = 84
3x + 12 = 42 3x = 30 x = 10
15
It is (x+6)(x+7) when factored
42
42 plus 3 is 45.
63 plus 47 plus 42 plus 21 is equal to 173.
72 + 72 + 42 = 186
How about: 63 plus 42
42 and 42
64 plus 18 plus 42 plus 48 plus 37 = 209
25+16+12+42+20=115
67+8+9+42 = 126
42 + 24 + 18 = 84
120 cm.
87+42+78 = 207