3(-5x+7)=81

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Solution for 3(-5x+7)=81 equation:


Simplifying
3(-5x + 7) = 81

Reorder the terms:
3(7 + -5x) = 81
(7 * 3 + -5x * 3) = 81
(21 + -15x) = 81

Solving
21 + -15x = 81

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + -15x = 81 + -21

Combine like terms: 21 + -21 = 0
0 + -15x = 81 + -21
-15x = 81 + -21

Combine like terms: 81 + -21 = 60
-15x = 60

Divide each side by '-15'.
x = -4

Simplifying
x = -4

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