-3(5x+7)=9

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Solution for -3(5x+7)=9 equation:


Simplifying
-3(5x + 7) = 9

Reorder the terms:
-3(7 + 5x) = 9
(7 * -3 + 5x * -3) = 9
(-21 + -15x) = 9

Solving
-21 + -15x = 9

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 = 9 + 21

Combine like terms: -21 + 21 = 0
0 + -15x = 9 + 21
-15x = 9 + 21

Combine like terms: 9 + 21 = 30
-15x = 30

Divide each side by '-15'.
x = -2

Simplifying
x = -2

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