3a-7=-28

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Solution for 3a-7=-28 equation: 


Simplifying
3a + -7 = -28

Reorder the terms:
-7 + 3a = -28

Solving
-7 + 3a = -28

Solving for variable 'a'.

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

Add '7' to each side of the equation.
-7 + 7 + 3a = -28 + 7

Combine like terms: -7 + 7 = 0
0 + 3a = -28 + 7
3a = -28 + 7

Combine like terms: -28 + 7 = -21
3a = -21

Divide each side by '3'.
a = -7

Simplifying
a = -7

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