3x+5=21-4

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Solution for 3x+5=21-4 equation: 


Simplifying
3x + 5 = 21 + -4

Reorder the terms:
5 + 3x = 21 + -4

Combine like terms: 21 + -4 = 17
5 + 3x = 17

Solving
5 + 3x = 17

Solving for variable 'x'.

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

Add '-5' to each side of the equation.
5 + -5 + 3x = 17 + -5

Combine like terms: 5 + -5 = 0
0 + 3x = 17 + -5
3x = 17 + -5

Combine like terms: 17 + -5 = 12
3x = 12

Divide each side by '3'.
x = 4

Simplifying
x = 4

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