2.5=e-4

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Solution for 2.5=e-4 equation:


Simplifying
2.5 = e + -4

Reorder the terms:
2.5 = -4 + e

Solving
2.5 = -4 + e

Solving for variable 'e'.

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

Add '-1e' to each side of the equation.
2.5 + -1e = -4 + e + -1e

Combine like terms: e + -1e = 0
2.5 + -1e = -4 + 0
2.5 + -1e = -4

Add '-2.5' to each side of the equation.
2.5 + -2.5 + -1e = -4 + -2.5

Combine like terms: 2.5 + -2.5 = 0.0
0.0 + -1e = -4 + -2.5
-1e = -4 + -2.5

Combine like terms: -4 + -2.5 = -6.5
-1e = -6.5

Divide each side by '-1'.
e = 6.5

Simplifying
e = 6.5

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