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2(1.5d - 2 + (0.7d + 1)) = 2(4 - 1.3d + (2.5 + d))

 

2(1.5d - 2 + 0.7d + 1) = 2(4 - 1.3d + 2.5 + d)

 

Combine like terms.

2(2.2d - 1) = 2(6.5 - 0.3d)

 

Divide both sides by 2.

2.2d - 1 = 6.5 - 0.3d

 

2.2d = 7.5 - 0.3d

 

2.5d = 7.5

 

d = 7.5/2.5

 

d = 3