-7(-3x+1)=140

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Solution for -7(-3x+1)=140 equation: 


Simplifying
-7(-3x + 1) = 140

Reorder the terms:
-7(1 + -3x) = 140
(1 * -7 + -3x * -7) = 140
(-7 + 21x) = 140

Solving
-7 + 21x = 140

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 = 140 + 7

Combine like terms: -7 + 7 = 0
0 + 21x = 140 + 7
21x = 140 + 7

Combine like terms: 140 + 7 = 147
21x = 147

Divide each side by '21'.
x = 7

Simplifying
x = 7

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