120+D+60+15+20=130+35+2d+0

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Solution for 120+D+60+15+20=130+35+2d+0 equation: 


Simplifying
120 + D + 60 + 15 + 20 = 130 + 35 + 2d + 0

Reorder the terms:
120 + 60 + 15 + 20 + D = 130 + 35 + 2d + 0

Combine like terms: 120 + 60 = 180
180 + 15 + 20 + D = 130 + 35 + 2d + 0

Combine like terms: 180 + 15 = 195
195 + 20 + D = 130 + 35 + 2d + 0

Combine like terms: 195 + 20 = 215
215 + D = 130 + 35 + 2d + 0

Reorder the terms:
215 + D = 130 + 35 + 0 + 2d

Combine like terms: 130 + 35 = 165
215 + D = 165 + 0 + 2d

Combine like terms: 165 + 0 = 165
215 + D = 165 + 2d

Solving
215 + D = 165 + 2d

Solving for variable 'D'.

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

Add '-215' to each side of the equation.
215 + -215 + D = 165 + -215 + 2d

Combine like terms: 215 + -215 = 0
0 + D = 165 + -215 + 2d
D = 165 + -215 + 2d

Combine like terms: 165 + -215 = -50
D = -50 + 2d

Simplifying
D = -50 + 2d

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