3(x+7)=45-3x

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Solution for 3(x+7)=45-3x equation:


Simplifying
3(x + 7) = 45 + -3x

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

Solving
21 + 3x = 45 + -3x

Solving for variable 'x'.

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

Add '3x' to each side of the equation.
21 + 3x + 3x = 45 + -3x + 3x

Combine like terms: 3x + 3x = 6x
21 + 6x = 45 + -3x + 3x

Combine like terms: -3x + 3x = 0
21 + 6x = 45 + 0
21 + 6x = 45

Add '-21' to each side of the equation.
21 + -21 + 6x = 45 + -21

Combine like terms: 21 + -21 = 0
0 + 6x = 45 + -21
6x = 45 + -21

Combine like terms: 45 + -21 = 24
6x = 24

Divide each side by '6'.
x = 4

Simplifying
x = 4

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