155=d-1+3d

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Solution for 155=d-1+3d equation:


Simplifying
155 = d + -1 + 3d

Reorder the terms:
155 = -1 + d + 3d

Combine like terms: d + 3d = 4d
155 = -1 + 4d

Solving
155 = -1 + 4d

Solving for variable 'd'.

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

Add '-4d' to each side of the equation.
155 + -4d = -1 + 4d + -4d

Combine like terms: 4d + -4d = 0
155 + -4d = -1 + 0
155 + -4d = -1

Add '-155' to each side of the equation.
155 + -155 + -4d = -1 + -155

Combine like terms: 155 + -155 = 0
0 + -4d = -1 + -155
-4d = -1 + -155

Combine like terms: -1 + -155 = -156
-4d = -156

Divide each side by '-4'.
d = 39

Simplifying
d = 39

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