((0.7*x)+(0.3*8.5))=5.5

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Solution for ((0.7*x)+(0.3*8.5))=5.5 equation: 


Simplifying
((0.7x) + (0.3 * 8.5)) = 5.5

Multiply 0.3 * 8.5
((0.7x) + (2.55)) = 5.5
((0.7x) + 2.55) = 5.5

Reorder the terms:
(2.55 + (0.7x)) = 5.5

Remove parenthesis around (2.55 + (0.7x))
2.55 + (0.7x) = 5.5

Solving
2.55 + (0.7x) = 5.5

Solving for variable 'x'.

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

Add '-2.55' to each side of the equation.
2.55 + -2.55 + (0.7x) = 5.5 + -2.55

Combine like terms: 2.55 + -2.55 = 0.00
0.00 + (0.7x) = 5.5 + -2.55
(0.7x) = 5.5 + -2.55

Combine like terms: 5.5 + -2.55 = 2.95
(0.7x) = 2.95

Divide each side by '0.7'.
x = 4.214285714

Simplifying
x = 4.214285714

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