-5(9+3x)=-90

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Solution for -5(9+3x)=-90 equation: 


Simplifying
-5(9 + 3x) = -90
(9 * -5 + 3x * -5) = -90
(-45 + -15x) = -90

Solving
-45 + -15x = -90

Solving for variable 'x'.

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

Add '45' to each side of the equation.
-45 + 45 + -15x = -90 + 45

Combine like terms: -45 + 45 = 0
0 + -15x = -90 + 45
-15x = -90 + 45

Combine like terms: -90 + 45 = -45
-15x = -45

Divide each side by '-15'.
x = 3

Simplifying
x = 3

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