7[x-2]=21

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Solution for 7[x-2]=21 equation: 


Simplifying
7[x + -2] = 21

Reorder the terms:
7[-2 + x] = 21
[-2 * 7 + x * 7] = 21
[-14 + 7x] = 21

Solving
-14 + 7x = 21

Solving for variable 'x'.

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

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

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

Combine like terms: 21 + 14 = 35
7x = 35

Divide each side by '7'.
x = 5

Simplifying
x = 5

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