3(d-13)+2(d-7)=7

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Solution for 3(d-13)+2(d-7)=7 equation:


Simplifying
3(d + -13) + 2(d + -7) = 7

Reorder the terms:
3(-13 + d) + 2(d + -7) = 7
(-13 * 3 + d * 3) + 2(d + -7) = 7
(-39 + 3d) + 2(d + -7) = 7

Reorder the terms:
-39 + 3d + 2(-7 + d) = 7
-39 + 3d + (-7 * 2 + d * 2) = 7
-39 + 3d + (-14 + 2d) = 7

Reorder the terms:
-39 + -14 + 3d + 2d = 7

Combine like terms: -39 + -14 = -53
-53 + 3d + 2d = 7

Combine like terms: 3d + 2d = 5d
-53 + 5d = 7

Solving
-53 + 5d = 7

Solving for variable 'd'.

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

Add '53' to each side of the equation.
-53 + 53 + 5d = 7 + 53

Combine like terms: -53 + 53 = 0
0 + 5d = 7 + 53
5d = 7 + 53

Combine like terms: 7 + 53 = 60
5d = 60

Divide each side by '5'.
d = 12

Simplifying
d = 12

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