x-18=5 times -5
x-18=-25
x=-25+18
x=-7
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The opposite of dividing is multiplying. To find your number, work backwards. Multiply 10 times 5. That is your number.
3x+32=4x-15 3x-4x=-15-32 x=-47
87
No. A decimal is a way of representing a quantity so that the place value of each digit is ten times the place value of the number to its right. So the opposite would be to find a way not to represent a number?! What is the point of that?
12-2n= -72n = 19n = 9.5