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Simplifying
18 = t2 + 15
Reorder the terms:
18 = 15 + t2
Solving
18 = 15 + t2
Solving for variable 't'.
Move all terms containing t to the left, all other terms to the right.
Add '-1t2' to each side of the equation.
18 + -1t2 = 15 + t2 + -1t2
Combine like terms: t2 + -1t2 = 0
18 + -1t2 = 15 + 0
18 + -1t2 = 15
Add '-18' to each side of the equation.
18 + -18 + -1t2 = 15 + -18
Combine like terms: 18 + -18 = 0
0 + -1t2 = 15 + -18
-1t2 = 15 + -18
Combine like terms: 15 + -18 = -3
-1t2 = -3
Divide each side by '-1'.
t2 = 3
Simplifying
t2 = 3
Take the square root of each side:
t = {-1.732050808, 1.732050808}
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