3-4=18+x

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Solution for 3-4=18+x equation:


Simplifying
3 + -4 = 18 + x

Combine like terms: 3 + -4 = -1
-1 = 18 + x

Solving
-1 = 18 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
-1 + -1x = 18 + x + -1x

Combine like terms: x + -1x = 0
-1 + -1x = 18 + 0
-1 + -1x = 18

Add '1' to each side of the equation.
-1 + 1 + -1x = 18 + 1

Combine like terms: -1 + 1 = 0
0 + -1x = 18 + 1
-1x = 18 + 1

Combine like terms: 18 + 1 = 19
-1x = 19

Divide each side by '-1'.
x = -19

Simplifying
x = -19

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