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Simplifying
-7 = 9t2 + -16
Reorder the terms:
-7 = -16 + 9t2
Solving
-7 = -16 + 9t2
Solving for variable 't'.
Move all terms containing t to the left, all other terms to the right.
Add '-9t2' to each side of the equation.
-7 + -9t2 = -16 + 9t2 + -9t2
Combine like terms: 9t2 + -9t2 = 0
-7 + -9t2 = -16 + 0
-7 + -9t2 = -16
Add '7' to each side of the equation.
-7 + 7 + -9t2 = -16 + 7
Combine like terms: -7 + 7 = 0
0 + -9t2 = -16 + 7
-9t2 = -16 + 7
Combine like terms: -16 + 7 = -9
-9t2 = -9
Divide each side by '-9'.
t2 = 1
Simplifying
t2 = 1
Take the square root of each side:
t = {-1, 1}
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