(-25d)-(-12d)+(-37)=54

Solution for (-25d)-(-12d)+(-37)=54 equation:

Simplifying
(-25d) + -1(-12d) + (-37) = 54

Remove parenthesis around (-12d)
(-25d) + -1 * -12d + (-37) = 54

Multiply -1 * -12
(-25d) + 12d + (-37) = 54
(-25d) + 12d + -37 = 54

Reorder the terms:
-37 + (-25d) + 12d = 54

Combine like terms: (-25d) + 12d = -13d
-37 + -13d = 54

Solving
-37 + -13d = 54

Solving for variable 'd'.

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

Add '37' to each side of the equation.
-37 + 37 + -13d = 54 + 37

Combine like terms: -37 + 37 = 0
0 + -13d = 54 + 37
-13d = 54 + 37

Combine like terms: 54 + 37 = 91
-13d = 91

Divide each side by '-13'.
d = -7

Simplifying
d = -7