If by "opposite" they mean "negative", the answers are
10 t -21 and x - 2z.
Just put a minus sign in front of the expression they give you, and remember that two minus signs make a plus.
in my workbook it says give the opposite of each expression and the problems are:
-10t+21
-x+2z
there are alot more but i thought if someone explained a couple of these to me maybe id understand the rest. idk just please help me!!!
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