-2(d+1.4)-1.8=20.6

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Solution for -2(d+1.4)-1.8=20.6 equation:


Simplifying
-2(d + 1.4) + -1.8 = 20.6

Reorder the terms:
-2(1.4 + d) + -1.8 = 20.6
(1.4 * -2 + d * -2) + -1.8 = 20.6
(-2.8 + -2d) + -1.8 = 20.6

Reorder the terms:
-2.8 + -1.8 + -2d = 20.6

Combine like terms: -2.8 + -1.8 = -4.6
-4.6 + -2d = 20.6

Solving
-4.6 + -2d = 20.6

Solving for variable 'd'.

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

Add '4.6' to each side of the equation.
-4.6 + 4.6 + -2d = 20.6 + 4.6

Combine like terms: -4.6 + 4.6 = 0.0
0.0 + -2d = 20.6 + 4.6
-2d = 20.6 + 4.6

Combine like terms: 20.6 + 4.6 = 25.2
-2d = 25.2

Divide each side by '-2'.
d = -12.6

Simplifying
d = -12.6

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