4d=21+2.5d

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Solution for 4d=21+2.5d equation: 


Simplifying
4d = 21 + 2.5d

Solving
4d = 21 + 2.5d

Solving for variable 'd'.

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

Add '-2.5d' to each side of the equation.
4d + -2.5d = 21 + 2.5d + -2.5d

Combine like terms: 4d + -2.5d = 1.5d
1.5d = 21 + 2.5d + -2.5d

Combine like terms: 2.5d + -2.5d = 0.0
1.5d = 21 + 0.0
1.5d = 21

Divide each side by '1.5'.
d = 14

Simplifying
d = 14

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