.4x^2+1.4x+k=7

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Solution for .4x^2+1.4x+k=7 equation: 


Simplifying
0.4x2 + 1.4x + k = 7

Reorder the terms:
k + 1.4x + 0.4x2 = 7

Solving
k + 1.4x + 0.4x2 = 7

Solving for variable 'k'.

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

Add '-1.4x' to each side of the equation.
k + 1.4x + -1.4x + 0.4x2 = 7 + -1.4x

Combine like terms: 1.4x + -1.4x = 0.0
k + 0.0 + 0.4x2 = 7 + -1.4x
k + 0.4x2 = 7 + -1.4x

Add '-0.4x2' to each side of the equation.
k + 0.4x2 + -0.4x2 = 7 + -1.4x + -0.4x2

Combine like terms: 0.4x2 + -0.4x2 = 0.0
k + 0.0 = 7 + -1.4x + -0.4x2
k = 7 + -1.4x + -0.4x2

Simplifying
k = 7 + -1.4x + -0.4x2

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