19 = 5x - 1
Solve for x.
Note the equal sign. What you do to one side, you do to the other. Isolate the x. Do the opposite of PEMDAS.
=> Addition Property of Equality.
Add 1 to both sides
19 = 5x - 1
19 (+1) = 5x - 1 (+1)
=> Combine like terms
Add 19 and 1
19 + 1 = 5x
20 = 5x
=> Division property of equality
Divide 5 from both sides
(20)/5 = (5x)/5
x = 20/5
x = 4
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hope this helps
~Rise Above the Ordinary