Question 94647
10x-5=20
10x-5+5=20+5
10x=25
10x/10=25/10
x=2.5
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Check by plugging (x-2.5) back into the original equation:
 5(2x - 1) = 20
 5(2(2.5) - 1) = 20
5(5.00-1)=20
5(4)=20
20=20