13=7-4(6-3d)

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Solution for 13=7-4(6-3d) equation:


Simplifying
13 = 7 + -4(6 + -3d)
13 = 7 + (6 * -4 + -3d * -4)
13 = 7 + (-24 + 12d)

Combine like terms: 7 + -24 = -17
13 = -17 + 12d

Solving
13 = -17 + 12d

Solving for variable 'd'.

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

Add '-12d' to each side of the equation.
13 + -12d = -17 + 12d + -12d

Combine like terms: 12d + -12d = 0
13 + -12d = -17 + 0
13 + -12d = -17

Add '-13' to each side of the equation.
13 + -13 + -12d = -17 + -13

Combine like terms: 13 + -13 = 0
0 + -12d = -17 + -13
-12d = -17 + -13

Combine like terms: -17 + -13 = -30
-12d = -30

Divide each side by '-12'.
d = 2.5

Simplifying
d = 2.5

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