That depends on the equation. In general, you'll try to isolate the variable, by using operations (on both sides of the equation) that get rid of anything other than the variable, on the side the variable is on.
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X2 = k Take square root each side. X = (+/-) sqrt(k) ============
No.
it is not an equation (there no equality in it!)
you have to focus on your unit and try your best by the way its your teacher
variable equation solve it test it