8-7x=-21

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Solution for 8-7x=-21 equation: 


Simplifying
8 + -7x = -21

Solving
8 + -7x = -21

Solving for variable 'x'.

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

Add '-8' to each side of the equation.
8 + -8 + -7x = -21 + -8

Combine like terms: 8 + -8 = 0
0 + -7x = -21 + -8
-7x = -21 + -8

Combine like terms: -21 + -8 = -29
-7x = -29

Divide each side by '-7'.
x = 4.142857143

Simplifying
x = 4.142857143

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