12x12=144...144-42=102. 102 is the answer. Or, is the question meaning 12-42, which equals -30. Then, it would be 12x-30=-360. So, it's either 102 or -360. One of those two must be right.
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(6 x 5) - (3 x 52) + (12/4) = 30 - 75 + 3 = -42
15 will go into 42 two times with 12 left over.
4m + 9 + 5m - 12 = 42 9m -3 = 42 9m = 42 + 3 9m = 45 m = 5
25 times 6 times 25 minus 8 plus 12 divided by 5 = 3,744.4
42 ÷ 12 = 3 with remainder 6