(7-2.1x)3+2(3.5x-6)=

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Solution for (7-2.1x)3+2(3.5x-6)= equation:


Simplifying
(7 + -2.1x) * 3 + 2(3.5x + -6) = 0

Reorder the terms for easier multiplication:
3(7 + -2.1x) + 2(3.5x + -6) = 0
(7 * 3 + -2.1x * 3) + 2(3.5x + -6) = 0
(21 + -6.3x) + 2(3.5x + -6) = 0

Reorder the terms:
21 + -6.3x + 2(-6 + 3.5x) = 0
21 + -6.3x + (-6 * 2 + 3.5x * 2) = 0
21 + -6.3x + (-12 + 7x) = 0

Reorder the terms:
21 + -12 + -6.3x + 7x = 0

Combine like terms: 21 + -12 = 9
9 + -6.3x + 7x = 0

Combine like terms: -6.3x + 7x = 0.7x
9 + 0.7x = 0

Solving
9 + 0.7x = 0

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 0.7x = 0 + -9

Combine like terms: 9 + -9 = 0
0 + 0.7x = 0 + -9
0.7x = 0 + -9

Combine like terms: 0 + -9 = -9
0.7x = -9

Divide each side by '0.7'.
x = -12.85714286

Simplifying
x = -12.85714286

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