28=t(r+u)

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Solution for 28=t(r+u) equation:


Simplifying
28 = t(r + u)
28 = (r * t + u * t)
28 = (rt + tu)

Solving
28 = rt + tu

Solving for variable 'r'.

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

Add '-1rt' to each side of the equation.
28 + -1rt = rt + -1rt + tu

Combine like terms: rt + -1rt = 0
28 + -1rt = 0 + tu
28 + -1rt = tu

Add '-28' to each side of the equation.
28 + -28 + -1rt = -28 + tu

Combine like terms: 28 + -28 = 0
0 + -1rt = -28 + tu
-1rt = -28 + tu

Divide each side by '-1t'.
r = 28t-1 + -1u

Simplifying
r = 28t-1 + -1u

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