They are called plus and minus - no difference there!
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What are you trying to get? (0,0) works for roots Hope I helped, Y.a.r.o.
Algebra
That is called "algebra".That is called "algebra".That is called "algebra".That is called "algebra".
Algebra and the answer is 1.68
If the question was a+8-4=16 what is a? you have to work backwards and change the plus to minus and minus to plus... 16+4-8=a, a=12 If the algebra question was a little bit more complicated like 2n+6= 20, that is the same as 2xn+6=20. Like before, we have to work backwards so (20-6):2=n, n=7