7[7-(-3x-4)]=126x+217

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Solution for 7[7-(-3x-4)]=126x+217 equation:


Simplifying
7[7 + -1(-3x + -4)] = 126x + 217

Reorder the terms:
7[7 + -1(-4 + -3x)] = 126x + 217
7[7 + (-4 * -1 + -3x * -1)] = 126x + 217
7[7 + (4 + 3x)] = 126x + 217

Combine like terms: 7 + 4 = 11
7[11 + 3x] = 126x + 217
[11 * 7 + 3x * 7] = 126x + 217
[77 + 21x] = 126x + 217

Reorder the terms:
77 + 21x = 217 + 126x

Solving
77 + 21x = 217 + 126x

Solving for variable 'x'.

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

Add '-126x' to each side of the equation.
77 + 21x + -126x = 217 + 126x + -126x

Combine like terms: 21x + -126x = -105x
77 + -105x = 217 + 126x + -126x

Combine like terms: 126x + -126x = 0
77 + -105x = 217 + 0
77 + -105x = 217

Add '-77' to each side of the equation.
77 + -77 + -105x = 217 + -77

Combine like terms: 77 + -77 = 0
0 + -105x = 217 + -77
-105x = 217 + -77

Combine like terms: 217 + -77 = 140
-105x = 140

Divide each side by '-105'.
x = -1.333333333

Simplifying
x = -1.333333333

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