7(x+3)=9(x+7)

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Solution for 7(x+3)=9(x+7) equation:


Simplifying
7(x + 3) = 9(x + 7)

Reorder the terms:
7(3 + x) = 9(x + 7)
(3 * 7 + x * 7) = 9(x + 7)
(21 + 7x) = 9(x + 7)

Reorder the terms:
21 + 7x = 9(7 + x)
21 + 7x = (7 * 9 + x * 9)
21 + 7x = (63 + 9x)

Solving
21 + 7x = 63 + 9x

Solving for variable 'x'.

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

Add '-9x' to each side of the equation.
21 + 7x + -9x = 63 + 9x + -9x

Combine like terms: 7x + -9x = -2x
21 + -2x = 63 + 9x + -9x

Combine like terms: 9x + -9x = 0
21 + -2x = 63 + 0
21 + -2x = 63

Add '-21' to each side of the equation.
21 + -21 + -2x = 63 + -21

Combine like terms: 21 + -21 = 0
0 + -2x = 63 + -21
-2x = 63 + -21

Combine like terms: 63 + -21 = 42
-2x = 42

Divide each side by '-2'.
x = -21

Simplifying
x = -21

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