21=t+6t

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Solution for 21=t+6t equation:


21=t+6t

We simplify the equation to the form, which is simple to understand 
21=t+6t

We move all terms containing t to the left and all other terms to the right. 
-1t-6t=-21

We simplify left and right side of the equation. 
-7t=-21

We divide both sides of the equation by -7 to get t. 
t=3

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