40=19+x

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Solution for 40=19+x equation:


Simplifying
40 = 19 + x

Solving
40 = 19 + 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.
40 + -1x = 19 + x + -1x

Combine like terms: x + -1x = 0
40 + -1x = 19 + 0
40 + -1x = 19

Add '-40' to each side of the equation.
40 + -40 + -1x = 19 + -40

Combine like terms: 40 + -40 = 0
0 + -1x = 19 + -40
-1x = 19 + -40

Combine like terms: 19 + -40 = -21
-1x = -21

Divide each side by '-1'.
x = 21

Simplifying
x = 21

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