91=3+4(3x+7)

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Solution for 91=3+4(3x+7) equation:


Simplifying
91 = 3 + 4(3x + 7)

Reorder the terms:
91 = 3 + 4(7 + 3x)
91 = 3 + (7 * 4 + 3x * 4)
91 = 3 + (28 + 12x)

Combine like terms: 3 + 28 = 31
91 = 31 + 12x

Solving
91 = 31 + 12x

Solving for variable 'x'.

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

Add '-12x' to each side of the equation.
91 + -12x = 31 + 12x + -12x

Combine like terms: 12x + -12x = 0
91 + -12x = 31 + 0
91 + -12x = 31

Add '-91' to each side of the equation.
91 + -91 + -12x = 31 + -91

Combine like terms: 91 + -91 = 0
0 + -12x = 31 + -91
-12x = 31 + -91

Combine like terms: 31 + -91 = -60
-12x = -60

Divide each side by '-12'.
x = 5

Simplifying
x = 5

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