-31=-1-3(1+3x)

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Solution for -31=-1-3(1+3x) equation:


Simplifying
-31 = -1 + -3(1 + 3x)
-31 = -1 + (1 * -3 + 3x * -3)
-31 = -1 + (-3 + -9x)

Combine like terms: -1 + -3 = -4
-31 = -4 + -9x

Solving
-31 = -4 + -9x

Solving for variable 'x'.

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

Add '9x' to each side of the equation.
-31 + 9x = -4 + -9x + 9x

Combine like terms: -9x + 9x = 0
-31 + 9x = -4 + 0
-31 + 9x = -4

Add '31' to each side of the equation.
-31 + 31 + 9x = -4 + 31

Combine like terms: -31 + 31 = 0
0 + 9x = -4 + 31
9x = -4 + 31

Combine like terms: -4 + 31 = 27
9x = 27

Divide each side by '9'.
x = 3

Simplifying
x = 3

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