3(x+5)2=21

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Solution for 3(x+5)2=21 equation:


Simplifying
3(x + 5) * 2 = 21

Reorder the terms:
3(5 + x) * 2 = 21

Reorder the terms for easier multiplication:
3 * 2(5 + x) = 21

Multiply 3 * 2
6(5 + x) = 21
(5 * 6 + x * 6) = 21
(30 + 6x) = 21

Solving
30 + 6x = 21

Solving for variable 'x'.

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

Add '-30' to each side of the equation.
30 + -30 + 6x = 21 + -30

Combine like terms: 30 + -30 = 0
0 + 6x = 21 + -30
6x = 21 + -30

Combine like terms: 21 + -30 = -9
6x = -9

Divide each side by '6'.
x = -1.5

Simplifying
x = -1.5

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