1+x-8x=15

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Solution for 1+x-8x=15 equation: 


Simplifying
1 + x + -8x = 15

Combine like terms: x + -8x = -7x
1 + -7x = 15

Solving
1 + -7x = 15

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 + -7x = 15 + -1

Combine like terms: 1 + -1 = 0
0 + -7x = 15 + -1
-7x = 15 + -1

Combine like terms: 15 + -1 = 14
-7x = 14

Divide each side by '-7'.
x = -2

Simplifying
x = -2

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