leave them for last, so when you combine all like terms you can solve for that variable exponent.
I personally hated Algebra, good luck!
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Same.
This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.
you do not do anything when you add numbers with exponents. you just figure out the answer. it is only if you multiply numbers with exponents, where you add the exponents..
You do not. The exponent is only subtracted in division.
It depends on whether you are working with variables. You cannot add terms with variables that have unlike exponents.