.40x+0.05(20-x)=0.10(-4)

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Solution for .40x+0.05(20-x)=0.10(-4) equation:


Simplifying
0.40x + 0.05(20 + -1x) = 0.10(-4)
0.40x + (20 * 0.05 + -1x * 0.05) = 0.10(-4)
0.40x + (1 + -0.05x) = 0.10(-4)

Reorder the terms:
1 + 0.40x + -0.05x = 0.10(-4)

Combine like terms: 0.40x + -0.05x = 0.35x
1 + 0.35x = 0.10(-4)

Multiply 0.10 * -4
1 + 0.35x = -0.4

Solving
1 + 0.35x = -0.4

Solving for variable 'x'.

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

Add '-1' to each side of the equation.
1 + -1 + 0.35x = -0.4 + -1

Combine like terms: 1 + -1 = 0
0 + 0.35x = -0.4 + -1
0.35x = -0.4 + -1

Combine like terms: -0.4 + -1 = -1.4
0.35x = -1.4

Divide each side by '0.35'.
x = -4

Simplifying
x = -4

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