7x+9-4(x+1)=8x+9

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Solution for 7x+9-4(x+1)=8x+9 equation:


Simplifying
7x + 9 + -4(x + 1) = 8x + 9

Reorder the terms:
7x + 9 + -4(1 + x) = 8x + 9
7x + 9 + (1 * -4 + x * -4) = 8x + 9
7x + 9 + (-4 + -4x) = 8x + 9

Reorder the terms:
9 + -4 + 7x + -4x = 8x + 9

Combine like terms: 9 + -4 = 5
5 + 7x + -4x = 8x + 9

Combine like terms: 7x + -4x = 3x
5 + 3x = 8x + 9

Reorder the terms:
5 + 3x = 9 + 8x

Solving
5 + 3x = 9 + 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.
5 + 3x + -8x = 9 + 8x + -8x

Combine like terms: 3x + -8x = -5x
5 + -5x = 9 + 8x + -8x

Combine like terms: 8x + -8x = 0
5 + -5x = 9 + 0
5 + -5x = 9

Add '-5' to each side of the equation.
5 + -5 + -5x = 9 + -5

Combine like terms: 5 + -5 = 0
0 + -5x = 9 + -5
-5x = 9 + -5

Combine like terms: 9 + -5 = 4
-5x = 4

Divide each side by '-5'.
x = -0.8

Simplifying
x = -0.8

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