7(3x-1)=77

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Solution for 7(3x-1)=77 equation: 


Simplifying
7(3x + -1) = 77

Reorder the terms:
7(-1 + 3x) = 77
(-1 * 7 + 3x * 7) = 77
(-7 + 21x) = 77

Solving
-7 + 21x = 77

Solving for variable 'x'.

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

Add '7' to each side of the equation.
-7 + 7 + 21x = 77 + 7

Combine like terms: -7 + 7 = 0
0 + 21x = 77 + 7
21x = 77 + 7

Combine like terms: 77 + 7 = 84
21x = 84

Divide each side by '21'.
x = 4

Simplifying
x = 4

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