X+3+(x+4)=20

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Solution for X+3+(x+4)=20 equation:


Simplifying
X + 3 + (x + 4) = 20

Reorder the terms:
X + 3 + (4 + x) = 20

Remove parenthesis around (4 + x)
X + 3 + 4 + x = 20

Reorder the terms:
3 + 4 + X + x = 20

Combine like terms: 3 + 4 = 7
7 + X + x = 20

Solving
7 + X + x = 20

Solving for variable 'X'.

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

Add '-7' to each side of the equation.
7 + X + -7 + x = 20 + -7

Reorder the terms:
7 + -7 + X + x = 20 + -7

Combine like terms: 7 + -7 = 0
0 + X + x = 20 + -7
X + x = 20 + -7

Combine like terms: 20 + -7 = 13
X + x = 13

Add '-1x' to each side of the equation.
X + x + -1x = 13 + -1x

Combine like terms: x + -1x = 0
X + 0 = 13 + -1x
X = 13 + -1x

Simplifying
X = 13 + -1x

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