Answer:
Explanation:
Isolate t on one side of the equation.
First, switch sides.
t+4=21
Next, subtract 4 from both sides.
t+4-4=21-4
Solve.
Subtract the numbers from left to right.
21-4=17
Therefore, the solution is t=17.
Answer: t = 17
Subtract 4 from each side.
t = 17
17 + 4 = 21
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