collect your like terms
t+1-4t+8=21
-3t + 9 = 21
subtract 9 from both sides
-3t = 12
divide by -3
t = -4
what is the answer for t+1-4t+8=21
2 answers
t+1-4t+8=21
-3t + 9 = 21
-3t = 12
t = -4
-3t + 9 = 21
-3t = 12
t = -4
1 answer