-7=7(5+3d)

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Solution for -7=7(5+3d) equation:


Simplifying
-7 = 7(5 + 3d)
-7 = (5 * 7 + 3d * 7)
-7 = (35 + 21d)

Solving
-7 = 35 + 21d

Solving for variable 'd'.

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

Add '-21d' to each side of the equation.
-7 + -21d = 35 + 21d + -21d

Combine like terms: 21d + -21d = 0
-7 + -21d = 35 + 0
-7 + -21d = 35

Add '7' to each side of the equation.
-7 + 7 + -21d = 35 + 7

Combine like terms: -7 + 7 = 0
0 + -21d = 35 + 7
-21d = 35 + 7

Combine like terms: 35 + 7 = 42
-21d = 42

Divide each side by '-21'.
d = -2

Simplifying
d = -2

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