undo the original operation
To solve an equation it is sometimes helpful to do what to the original operation?
undo
undo
Undo
Sure. You can always 'solve for' a variable, and if it happens to be the only variable in the equation, than that's how you solve the equation.
you don't answer an equation, you solve an equation
To determine atleast one short of all variables by means of given conditions.
It really depends on the type of equation. Sometimes you can know, from experience with similar equations. But in many cases, you have to actually do the work of trying to solve the equation.
solve it
If you solve such an equation for "y", you get an equation in the slope-intercept form.
It is not an equation if it does not have an equals sign. You could simplify it but not solve it.
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