.20*89+.50*97+.30*E=

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Solution for .20*89+.50*97+.30*E= equation: 


Simplifying
0.20 * 89 + 0.50 * 97 + 0.30E = 0

Multiply 0.20 * 89
17.8 + 0.50 * 97 + 0.30E = 0

Multiply 0.50 * 97
17.8 + 48.5 + 0.30E = 0

Combine like terms: 17.8 + 48.5 = 66.3
66.3 + 0.30E = 0

Solving
66.3 + 0.30E = 0

Solving for variable 'E'.

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

Add '-66.3' to each side of the equation.
66.3 + -66.3 + 0.30E = 0 + -66.3

Combine like terms: 66.3 + -66.3 = 0.0
0.0 + 0.30E = 0 + -66.3
0.30E = 0 + -66.3

Combine like terms: 0 + -66.3 = -66.3
0.30E = -66.3

Divide each side by '0.30'.
E = -221

Simplifying
E = -221

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