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

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


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

Reorder the terms:
-1 + 8x + -7x = 9

Combine like terms: 8x + -7x = 1x
-1 + 1x = 9

Solving
-1 + 1x = 9

Solving for variable 'x'.

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

Add '1' to each side of the equation.
-1 + 1 + 1x = 9 + 1

Combine like terms: -1 + 1 = 0
0 + 1x = 9 + 1
1x = 9 + 1

Combine like terms: 9 + 1 = 10
1x = 10

Divide each side by '1'.
x = 10

Simplifying
x = 10

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