SOLUTION: if you have an equation like 7b - 2a when a=-3 and b=4 do you just say 74-23 or 7x4-2x3

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Question 1088551: if you have an equation like 7b - 2a when a=-3 and b=4 do you just say 74-23 or 7x4-2x3
Answer by MathLover1(20849) About Me  (Show Source):
You can put this solution on YOUR website!

7b+-+2a+
when a=-3 and b=4, you just substitute -3 for a, and 4 for b
7b+-+2a+=7%2A4+-+2%28-3%29+
7b+-+2a+=28+%2B+6+
7b+-+2a+=34+