0.4(x-7)=0.8(x-5)

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Solution for 0.4(x-7)=0.8(x-5) equation:


Simplifying
0.4(x + -7) = 0.8(x + -5)

Reorder the terms:
0.4(-7 + x) = 0.8(x + -5)
(-7 * 0.4 + x * 0.4) = 0.8(x + -5)
(-2.8 + 0.4x) = 0.8(x + -5)

Reorder the terms:
-2.8 + 0.4x = 0.8(-5 + x)
-2.8 + 0.4x = (-5 * 0.8 + x * 0.8)
-2.8 + 0.4x = (-4 + 0.8x)

Solving
-2.8 + 0.4x = -4 + 0.8x

Solving for variable 'x'.

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

Add '-0.8x' to each side of the equation.
-2.8 + 0.4x + -0.8x = -4 + 0.8x + -0.8x

Combine like terms: 0.4x + -0.8x = -0.4x
-2.8 + -0.4x = -4 + 0.8x + -0.8x

Combine like terms: 0.8x + -0.8x = 0.0
-2.8 + -0.4x = -4 + 0.0
-2.8 + -0.4x = -4

Add '2.8' to each side of the equation.
-2.8 + 2.8 + -0.4x = -4 + 2.8

Combine like terms: -2.8 + 2.8 = 0.0
0.0 + -0.4x = -4 + 2.8
-0.4x = -4 + 2.8

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

Divide each side by '-0.4'.
x = 3

Simplifying
x = 3

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