-7(3I+8)=28

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Solution for -7(3I+8)=28 equation:


Simplifying
-7(3I + 8) = 28

Reorder the terms:
-7(8 + 3I) = 28
(8 * -7 + 3I * -7) = 28
(-56 + -21I) = 28

Solving
-56 + -21I = 28

Solving for variable 'I'.

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

Add '56' to each side of the equation.
-56 + 56 + -21I = 28 + 56

Combine like terms: -56 + 56 = 0
0 + -21I = 28 + 56
-21I = 28 + 56

Combine like terms: 28 + 56 = 84
-21I = 84

Divide each side by '-21'.
I = -4

Simplifying
I = -4

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