-7x-21=7(x-1)

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Solution for -7x-21=7(x-1) equation:


Simplifying
-7x + -21 = 7(x + -1)

Reorder the terms:
-21 + -7x = 7(x + -1)

Reorder the terms:
-21 + -7x = 7(-1 + x)
-21 + -7x = (-1 * 7 + x * 7)
-21 + -7x = (-7 + 7x)

Solving
-21 + -7x = -7 + 7x

Solving for variable 'x'.

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

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

Combine like terms: -7x + -7x = -14x
-21 + -14x = -7 + 7x + -7x

Combine like terms: 7x + -7x = 0
-21 + -14x = -7 + 0
-21 + -14x = -7

Add '21' to each side of the equation.
-21 + 21 + -14x = -7 + 21

Combine like terms: -21 + 21 = 0
0 + -14x = -7 + 21
-14x = -7 + 21

Combine like terms: -7 + 21 = 14
-14x = 14

Divide each side by '-14'.
x = -1

Simplifying
x = -1

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