77+X+50+X+65=90

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Solution for 77+X+50+X+65=90 equation: 


Simplifying
77 + X + 50 + X + 65 = 90

Reorder the terms:
77 + 50 + 65 + X + X = 90

Combine like terms: 77 + 50 = 127
127 + 65 + X + X = 90

Combine like terms: 127 + 65 = 192
192 + X + X = 90

Combine like terms: X + X = 2X
192 + 2X = 90

Solving
192 + 2X = 90

Solving for variable 'X'.

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

Add '-192' to each side of the equation.
192 + -192 + 2X = 90 + -192

Combine like terms: 192 + -192 = 0
0 + 2X = 90 + -192
2X = 90 + -192

Combine like terms: 90 + -192 = -102
2X = -102

Divide each side by '2'.
X = -51

Simplifying
X = -51

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