Multiply the negatives and subtract from the sum of the positives.
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- 15 = 3X - 12add 12 to each side12 + - 15 = 3X - 12 + 12- 3 = 3Xdivide both sides integers by 3- 3/3 = (3/3)X- 1 = X======check in original equation- 15 = 3(- 1) - 12- 15 = - 3 - 12- 15 = - 15=========checks
15-3 times 2 equals 15-6 equals 9.
If the question is, What x 3 equals 15? Then 5 x 3 = 15 If the question is, What is 15 x 3? Then 15 x 3 = 45
a - 15 = 3 a - 15 + 15 = 3 + 15 a = 18
15 plus -3 equals 12 12 divided by -6 equals -2