3(4-d)-30=21s-6(3+4d)

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Solution for 3(4-d)-30=21s-6(3+4d) equation:


Simplifying
3(4 + -1d) + -30 = 21s + -6(3 + 4d)
(4 * 3 + -1d * 3) + -30 = 21s + -6(3 + 4d)
(12 + -3d) + -30 = 21s + -6(3 + 4d)

Reorder the terms:
12 + -30 + -3d = 21s + -6(3 + 4d)

Combine like terms: 12 + -30 = -18
-18 + -3d = 21s + -6(3 + 4d)
-18 + -3d = 21s + (3 * -6 + 4d * -6)
-18 + -3d = 21s + (-18 + -24d)

Reorder the terms:
-18 + -3d = -18 + -24d + 21s

Add '18' to each side of the equation.
-18 + 18 + -3d = -18 + -24d + 18 + 21s

Combine like terms: -18 + 18 = 0
0 + -3d = -18 + -24d + 18 + 21s
-3d = -18 + -24d + 18 + 21s

Reorder the terms:
-3d = -18 + 18 + -24d + 21s

Combine like terms: -18 + 18 = 0
-3d = 0 + -24d + 21s
-3d = -24d + 21s

Solving
-3d = -24d + 21s

Solving for variable 'd'.

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

Add '24d' to each side of the equation.
-3d + 24d = -24d + 24d + 21s

Combine like terms: -3d + 24d = 21d
21d = -24d + 24d + 21s

Combine like terms: -24d + 24d = 0
21d = 0 + 21s
21d = 21s

Divide each side by '21'.
d = s

Simplifying
d = s

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