8x+3(-12.9)=-23

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Solution for 8x+3(-12.9)=-23 equation: 


Simplifying
8x + 3(-12.9) = -23

Multiply 3 * -12.9
8x + -38.7 = -23

Reorder the terms:
-38.7 + 8x = -23

Solving
-38.7 + 8x = -23

Solving for variable 'x'.

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

Add '38.7' to each side of the equation.
-38.7 + 38.7 + 8x = -23 + 38.7

Combine like terms: -38.7 + 38.7 = 0.0
0.0 + 8x = -23 + 38.7
8x = -23 + 38.7

Combine like terms: -23 + 38.7 = 15.7
8x = 15.7

Divide each side by '8'.
x = 1.9625

Simplifying
x = 1.9625

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