81=-3(4y-5)

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Solution for 81=-3(4y-5) equation:


Simplifying
81 = -3(4y + -5)

Reorder the terms:
81 = -3(-5 + 4y)
81 = (-5 * -3 + 4y * -3)
81 = (15 + -12y)

Solving
81 = 15 + -12y

Solving for variable 'y'.

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

Add '12y' to each side of the equation.
81 + 12y = 15 + -12y + 12y

Combine like terms: -12y + 12y = 0
81 + 12y = 15 + 0
81 + 12y = 15

Add '-81' to each side of the equation.
81 + -81 + 12y = 15 + -81

Combine like terms: 81 + -81 = 0
0 + 12y = 15 + -81
12y = 15 + -81

Combine like terms: 15 + -81 = -66
12y = -66

Divide each side by '12'.
y = -5.5

Simplifying
y = -5.5

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