Is r = -1 a solution to the equation 6(r – 4) = 30r
2 answers:
6(-1 - 4) = 30(-1)
6(-5) = -30
-30 = -30
so -1 is a solution
You can try to insert r=-1:
6(-1-4) = 30*-1
-6-24=-30
-30=-30
So, yes r = -1 is a solution to the equation.
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