40=8+15+d

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Solution for 40=8+15+d equation:


Simplifying
40 = 8 + 15 + d

Combine like terms: 8 + 15 = 23
40 = 23 + d

Solving
40 = 23 + d

Solving for variable 'd'.

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

Add '-1d' to each side of the equation.
40 + -1d = 23 + d + -1d

Combine like terms: d + -1d = 0
40 + -1d = 23 + 0
40 + -1d = 23

Add '-40' to each side of the equation.
40 + -40 + -1d = 23 + -40

Combine like terms: 40 + -40 = 0
0 + -1d = 23 + -40
-1d = 23 + -40

Combine like terms: 23 + -40 = -17
-1d = -17

Divide each side by '-1'.
d = 17

Simplifying
d = 17

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