12.4-2.8(x+3)=-12.8

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Solution for 12.4-2.8(x+3)=-12.8 equation: 


Simplifying
12.4 + -2.8(x + 3) = -12.8

Reorder the terms:
12.4 + -2.8(3 + x) = -12.8
12.4 + (3 * -2.8 + x * -2.8) = -12.8
12.4 + (-8.4 + -2.8x) = -12.8

Combine like terms: 12.4 + -8.4 = 4
4 + -2.8x = -12.8

Solving
4 + -2.8x = -12.8

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + -2.8x = -12.8 + -4

Combine like terms: 4 + -4 = 0
0 + -2.8x = -12.8 + -4
-2.8x = -12.8 + -4

Combine like terms: -12.8 + -4 = -16.8
-2.8x = -16.8

Divide each side by '-2.8'.
x = 6

Simplifying
x = 6

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