It is 12=12/4-7=9
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When you are solving a 2-step equation, you do the opposite of a 1-step equation. You do addition and subtraction first, then the multiplication second. Example: 2x + 9=16 -9 -9 2x=7 Now it's a 1-step equation 2x=7 /2 /2 Your answer would be 3.5 To check all you do is replace the variable with your answer. 2x + 9=16 2(3.5) + 9=16
5x-2x=9
An equation is a statement that two things are equal; it has an equal sign which looks like this: = So if, for example, 2x + 5 = y4 - 27, that's an equation. A collection of numbers and/or letters that does not have an equal sign would be an expression. For example, 3x(9 + x).
That's not an equation, it has no equal sign. It seems that when typing a question, the equal sign and some other signs get eliminated on this site; you'll have to write the equal sign as "equals" or "equal"; similarly for some other special symbols.
If: x/8 +2 = 9 then x = 56