7e-21=28

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Solution for 7e-21=28 equation: 


Simplifying
7e + -21 = 28

Reorder the terms:
-21 + 7e = 28

Solving
-21 + 7e = 28

Solving for variable 'e'.

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

Add '21' to each side of the equation.
-21 + 21 + 7e = 28 + 21

Combine like terms: -21 + 21 = 0
0 + 7e = 28 + 21
7e = 28 + 21

Combine like terms: 28 + 21 = 49
7e = 49

Divide each side by '7'.
e = 7

Simplifying
e = 7

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