a(5i-7j)+b(-7i+2j)+(28i+20j)=0

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Solution for a(5i-7j)+b(-7i+2j)+(28i+20j)=0 equation:


Simplifying
a(5i + -7j) + b(-7i + 2j) + (28i + 20j) = 0
(5i * a + -7j * a) + b(-7i + 2j) + (28i + 20j) = 0
(5ai + -7aj) + b(-7i + 2j) + (28i + 20j) = 0
5ai + -7aj + (-7i * b + 2j * b) + (28i + 20j) = 0
5ai + -7aj + (-7bi + 2bj) + (28i + 20j) = 0

Remove parenthesis around (28i + 20j)
5ai + -7aj + -7bi + 2bj + 28i + 20j = 0

Solving
5ai + -7aj + -7bi + 2bj + 28i + 20j = 0

Solving for variable 'a'.

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

Add '7bi' to each side of the equation.
5ai + -7aj + -7bi + 2bj + 28i + 7bi + 20j = 0 + 7bi

Reorder the terms:
5ai + -7aj + -7bi + 7bi + 2bj + 28i + 20j = 0 + 7bi

Combine like terms: -7bi + 7bi = 0
5ai + -7aj + 0 + 2bj + 28i + 20j = 0 + 7bi
5ai + -7aj + 2bj + 28i + 20j = 0 + 7bi
Remove the zero:
5ai + -7aj + 2bj + 28i + 20j = 7bi

Add '-2bj' to each side of the equation.
5ai + -7aj + 2bj + 28i + -2bj + 20j = 7bi + -2bj

Reorder the terms:
5ai + -7aj + 2bj + -2bj + 28i + 20j = 7bi + -2bj

Combine like terms: 2bj + -2bj = 0
5ai + -7aj + 0 + 28i + 20j = 7bi + -2bj
5ai + -7aj + 28i + 20j = 7bi + -2bj

Add '-28i' to each side of the equation.
5ai + -7aj + 28i + -28i + 20j = 7bi + -2bj + -28i

Combine like terms: 28i + -28i = 0
5ai + -7aj + 0 + 20j = 7bi + -2bj + -28i
5ai + -7aj + 20j = 7bi + -2bj + -28i

Add '-20j' to each side of the equation.
5ai + -7aj + 20j + -20j = 7bi + -2bj + -28i + -20j

Combine like terms: 20j + -20j = 0
5ai + -7aj + 0 = 7bi + -2bj + -28i + -20j
5ai + -7aj = 7bi + -2bj + -28i + -20j

Reorder the terms:
5ai + -7aj + -7bi + 2bj + 28i + 20j = 7bi + -7bi + -2bj + 2bj + -28i + 28i + -20j + 20j

Combine like terms: 7bi + -7bi = 0
5ai + -7aj + -7bi + 2bj + 28i + 20j = 0 + -2bj + 2bj + -28i + 28i + -20j + 20j
5ai + -7aj + -7bi + 2bj + 28i + 20j = -2bj + 2bj + -28i + 28i + -20j + 20j

Combine like terms: -2bj + 2bj = 0
5ai + -7aj + -7bi + 2bj + 28i + 20j = 0 + -28i + 28i + -20j + 20j
5ai + -7aj + -7bi + 2bj + 28i + 20j = -28i + 28i + -20j + 20j

Combine like terms: -28i + 28i = 0
5ai + -7aj + -7bi + 2bj + 28i + 20j = 0 + -20j + 20j
5ai + -7aj + -7bi + 2bj + 28i + 20j = -20j + 20j

Combine like terms: -20j + 20j = 0
5ai + -7aj + -7bi + 2bj + 28i + 20j = 0

The solution to this equation could not be determined.

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