.3x+.1(x+9)=12.6

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Solution for .3x+.1(x+9)=12.6 equation:


Simplifying
0.3x + 0.1(x + 9) = 12.6

Reorder the terms:
0.3x + 0.1(9 + x) = 12.6
0.3x + (9 * 0.1 + x * 0.1) = 12.6
0.3x + (0.9 + 0.1x) = 12.6

Reorder the terms:
0.9 + 0.3x + 0.1x = 12.6

Combine like terms: 0.3x + 0.1x = 0.4x
0.9 + 0.4x = 12.6

Solving
0.9 + 0.4x = 12.6

Solving for variable 'x'.

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

Add '-0.9' to each side of the equation.
0.9 + -0.9 + 0.4x = 12.6 + -0.9

Combine like terms: 0.9 + -0.9 = 0.0
0.0 + 0.4x = 12.6 + -0.9
0.4x = 12.6 + -0.9

Combine like terms: 12.6 + -0.9 = 11.7
0.4x = 11.7

Divide each side by '0.4'.
x = 29.25

Simplifying
x = 29.25

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