-7(x-3)-4=21

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Solution for -7(x-3)-4=21 equation:


Simplifying
-7(x + -3) + -4 = 21

Reorder the terms:
-7(-3 + x) + -4 = 21
(-3 * -7 + x * -7) + -4 = 21
(21 + -7x) + -4 = 21

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

Combine like terms: 21 + -4 = 17
17 + -7x = 21

Solving
17 + -7x = 21

Solving for variable 'x'.

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

Add '-17' to each side of the equation.
17 + -17 + -7x = 21 + -17

Combine like terms: 17 + -17 = 0
0 + -7x = 21 + -17
-7x = 21 + -17

Combine like terms: 21 + -17 = 4
-7x = 4

Divide each side by '-7'.
x = -0.5714285714

Simplifying
x = -0.5714285714

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