21+3x+x=61

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Solution for 21+3x+x=61 equation: 


Simplifying
21 + 3x + x = 61

Combine like terms: 3x + x = 4x
21 + 4x = 61

Solving
21 + 4x = 61

Solving for variable 'x'.

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

Add '-21' to each side of the equation.
21 + -21 + 4x = 61 + -21

Combine like terms: 21 + -21 = 0
0 + 4x = 61 + -21
4x = 61 + -21

Combine like terms: 61 + -21 = 40
4x = 40

Divide each side by '4'.
x = 10

Simplifying
x = 10

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