3(u-d)=30

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Solution for 3(u-d)=30 equation: 


Simplifying
3(u + -1d) = 30

Reorder the terms:
3(-1d + u) = 30
(-1d * 3 + u * 3) = 30
(-3d + 3u) = 30

Solving
-3d + 3u = 30

Solving for variable 'd'.

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

Add '-3u' to each side of the equation.
-3d + 3u + -3u = 30 + -3u

Combine like terms: 3u + -3u = 0
-3d + 0 = 30 + -3u
-3d = 30 + -3u

Divide each side by '-3'.
d = -10 + u

Simplifying
d = -10 + u

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