9(9+x)=8(8+x)

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Solution for 9(9+x)=8(8+x) equation:


Simplifying
9(9 + x) = 8(8 + x)
(9 * 9 + x * 9) = 8(8 + x)
(81 + 9x) = 8(8 + x)
81 + 9x = (8 * 8 + x * 8)
81 + 9x = (64 + 8x)

Solving
81 + 9x = 64 + 8x

Solving for variable 'x'.

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

Add '-8x' to each side of the equation.
81 + 9x + -8x = 64 + 8x + -8x

Combine like terms: 9x + -8x = 1x
81 + 1x = 64 + 8x + -8x

Combine like terms: 8x + -8x = 0
81 + 1x = 64 + 0
81 + 1x = 64

Add '-81' to each side of the equation.
81 + -81 + 1x = 64 + -81

Combine like terms: 81 + -81 = 0
0 + 1x = 64 + -81
1x = 64 + -81

Combine like terms: 64 + -81 = -17
1x = -17

Divide each side by '1'.
x = -17

Simplifying
x = -17

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