13+7=4+x

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Solution for 13+7=4+x equation:


Simplifying
13 + 7 = 4 + x

Combine like terms: 13 + 7 = 20
20 = 4 + x

Solving
20 = 4 + 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.
20 + -1x = 4 + x + -1x

Combine like terms: x + -1x = 0
20 + -1x = 4 + 0
20 + -1x = 4

Add '-20' to each side of the equation.
20 + -20 + -1x = 4 + -20

Combine like terms: 20 + -20 = 0
0 + -1x = 4 + -20
-1x = 4 + -20

Combine like terms: 4 + -20 = -16
-1x = -16

Divide each side by '-1'.
x = 16

Simplifying
x = 16

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