2[5r+9t]=69

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Solution for 2[5r+9t]=69 equation: 


Simplifying
2[5r + 9t] = 69
[5r * 2 + 9t * 2] = 69
[10r + 18t] = 69

Solving
10r + 18t = 69

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-18t' to each side of the equation.
10r + 18t + -18t = 69 + -18t

Combine like terms: 18t + -18t = 0
10r + 0 = 69 + -18t
10r = 69 + -18t

Divide each side by '10'.
r = 6.9 + -1.8t

Simplifying
r = 6.9 + -1.8t

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