3(x-21)=x+4

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Solution for 3(x-21)=x+4 equation:


Simplifying
3(x + -21) = x + 4

Reorder the terms:
3(-21 + x) = x + 4
(-21 * 3 + x * 3) = x + 4
(-63 + 3x) = x + 4

Reorder the terms:
-63 + 3x = 4 + x

Solving
-63 + 3x = 4 + 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.
-63 + 3x + -1x = 4 + x + -1x

Combine like terms: 3x + -1x = 2x
-63 + 2x = 4 + x + -1x

Combine like terms: x + -1x = 0
-63 + 2x = 4 + 0
-63 + 2x = 4

Add '63' to each side of the equation.
-63 + 63 + 2x = 4 + 63

Combine like terms: -63 + 63 = 0
0 + 2x = 4 + 63
2x = 4 + 63

Combine like terms: 4 + 63 = 67
2x = 67

Divide each side by '2'.
x = 33.5

Simplifying
x = 33.5

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