3x-3(7x+15)=99

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Solution for 3x-3(7x+15)=99 equation:


Simplifying
3x + -3(7x + 15) = 99

Reorder the terms:
3x + -3(15 + 7x) = 99
3x + (15 * -3 + 7x * -3) = 99
3x + (-45 + -21x) = 99

Reorder the terms:
-45 + 3x + -21x = 99

Combine like terms: 3x + -21x = -18x
-45 + -18x = 99

Solving
-45 + -18x = 99

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 + -18x = 99 + 45

Combine like terms: -45 + 45 = 0
0 + -18x = 99 + 45
-18x = 99 + 45

Combine like terms: 99 + 45 = 144
-18x = 144

Divide each side by '-18'.
x = -8

Simplifying
x = -8

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