-7-3=5+X

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Solution for -7-3=5+X equation: 


Simplifying
-7 + -3 = 5 + X

Combine like terms: -7 + -3 = -10
-10 = 5 + X

Solving
-10 = 5 + 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.
-10 + -1X = 5 + X + -1X

Combine like terms: X + -1X = 0
-10 + -1X = 5 + 0
-10 + -1X = 5

Add '10' to each side of the equation.
-10 + 10 + -1X = 5 + 10

Combine like terms: -10 + 10 = 0
0 + -1X = 5 + 10
-1X = 5 + 10

Combine like terms: 5 + 10 = 15
-1X = 15

Divide each side by '-1'.
X = -15

Simplifying
X = -15

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