3(3)+3s=21

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Solution for 3(3)+3s=21 equation: 


Simplifying
3(3) + 3s = 21

Multiply 3 * 3
9 + 3s = 21

Solving
9 + 3s = 21

Solving for variable 's'.

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

Add '-9' to each side of the equation.
9 + -9 + 3s = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 3s = 21 + -9
3s = 21 + -9

Combine like terms: 21 + -9 = 12
3s = 12

Divide each side by '3'.
s = 4

Simplifying
s = 4

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