4=-0.4(x-3)

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Solution for 4=-0.4(x-3) equation:


Simplifying
4 = -0.4(x + -3)

Reorder the terms:
4 = -0.4(-3 + x)
4 = (-3 * -0.4 + x * -0.4)
4 = (1.2 + -0.4x)

Solving
4 = 1.2 + -0.4x

Solving for variable 'x'.

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

Add '0.4x' to each side of the equation.
4 + 0.4x = 1.2 + -0.4x + 0.4x

Combine like terms: -0.4x + 0.4x = 0.0
4 + 0.4x = 1.2 + 0.0
4 + 0.4x = 1.2

Add '-4' to each side of the equation.
4 + -4 + 0.4x = 1.2 + -4

Combine like terms: 4 + -4 = 0
0 + 0.4x = 1.2 + -4
0.4x = 1.2 + -4

Combine like terms: 1.2 + -4 = -2.8
0.4x = -2.8

Divide each side by '0.4'.
x = -7

Simplifying
x = -7

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