7x-(4x-21)=

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Solution for 7x-(4x-21)= equation:


Simplifying
7x + -1(4x + -21) = 0

Reorder the terms:
7x + -1(-21 + 4x) = 0
7x + (-21 * -1 + 4x * -1) = 0
7x + (21 + -4x) = 0

Reorder the terms:
21 + 7x + -4x = 0

Combine like terms: 7x + -4x = 3x
21 + 3x = 0

Solving
21 + 3x = 0

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 3x = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 3x = 0 + -21
3x = 0 + -21

Combine like terms: 0 + -21 = -21
3x = -21

Divide each side by '3'.
x = -7

Simplifying
x = -7

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