-3(5+7x)=216

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Solution for -3(5+7x)=216 equation: 


Simplifying
-3(5 + 7x) = 216
(5 * -3 + 7x * -3) = 216
(-15 + -21x) = 216

Solving
-15 + -21x = 216

Solving for variable 'x'.

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

Add '15' to each side of the equation.
-15 + 15 + -21x = 216 + 15

Combine like terms: -15 + 15 = 0
0 + -21x = 216 + 15
-21x = 216 + 15

Combine like terms: 216 + 15 = 231
-21x = 231

Divide each side by '-21'.
x = -11

Simplifying
x = -11

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