4x+21+X+45=90

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Solution for 4x+21+X+45=90 equation:


Simplifying
4x + 21 + X + 45 = 90

Reorder the terms:
21 + 45 + X + 4x = 90

Combine like terms: 21 + 45 = 66
66 + X + 4x = 90

Solving
66 + X + 4x = 90

Solving for variable 'X'.

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

Add '-66' to each side of the equation.
66 + X + -66 + 4x = 90 + -66

Reorder the terms:
66 + -66 + X + 4x = 90 + -66

Combine like terms: 66 + -66 = 0
0 + X + 4x = 90 + -66
X + 4x = 90 + -66

Combine like terms: 90 + -66 = 24
X + 4x = 24

Add '-4x' to each side of the equation.
X + 4x + -4x = 24 + -4x

Combine like terms: 4x + -4x = 0
X + 0 = 24 + -4x
X = 24 + -4x

Simplifying
X = 24 + -4x

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