31=7x-18

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Solution for 31=7x-18 equation:


Simplifying
31 = 7x + -18

Reorder the terms:
31 = -18 + 7x

Solving
31 = -18 + 7x

Solving for variable 'x'.

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

Add '-7x' to each side of the equation.
31 + -7x = -18 + 7x + -7x

Combine like terms: 7x + -7x = 0
31 + -7x = -18 + 0
31 + -7x = -18

Add '-31' to each side of the equation.
31 + -31 + -7x = -18 + -31

Combine like terms: 31 + -31 = 0
0 + -7x = -18 + -31
-7x = -18 + -31

Combine like terms: -18 + -31 = -49
-7x = -49

Divide each side by '-7'.
x = 7

Simplifying
x = 7

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