Answer:
y = 40
Explanation:
Isolate the variable (y). Note the equal sign, what you do to one side, you do to the other. Add 4 to both sides.
y - 4 = 36
y - 4 (+4) = 36 (+4)
y = 36 + 4
y = 40
Check. Substitute 40 for y.
Plug in 40 for y.
y - 4 = 36
(40) - 4 = 36
36 = 36 (True).
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