90=-6(-7+a)

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Solution for 90=-6(-7+a) equation:


Simplifying
90 = -6(-7 + a)
90 = (-7 * -6 + a * -6)
90 = (42 + -6a)

Solving
90 = 42 + -6a

Solving for variable 'a'.

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

Add '6a' to each side of the equation.
90 + 6a = 42 + -6a + 6a

Combine like terms: -6a + 6a = 0
90 + 6a = 42 + 0
90 + 6a = 42

Add '-90' to each side of the equation.
90 + -90 + 6a = 42 + -90

Combine like terms: 90 + -90 = 0
0 + 6a = 42 + -90
6a = 42 + -90

Combine like terms: 42 + -90 = -48
6a = -48

Divide each side by '6'.
a = -8

Simplifying
a = -8

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