10d+5(60-d)=400

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Solution for 10d+5(60-d)=400 equation:


Simplifying
10d + 5(60 + -1d) = 400
10d + (60 * 5 + -1d * 5) = 400
10d + (300 + -5d) = 400

Reorder the terms:
300 + 10d + -5d = 400

Combine like terms: 10d + -5d = 5d
300 + 5d = 400

Solving
300 + 5d = 400

Solving for variable 'd'.

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

Add '-300' to each side of the equation.
300 + -300 + 5d = 400 + -300

Combine like terms: 300 + -300 = 0
0 + 5d = 400 + -300
5d = 400 + -300

Combine like terms: 400 + -300 = 100
5d = 100

Divide each side by '5'.
d = 20

Simplifying
d = 20

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