4x+-3(-3)=21

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


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

Multiply -3 * -3
4x + 9 = 21

Reorder the terms:
9 + 4x = 21

Solving
9 + 4x = 21

Solving for variable 'x'.

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

Add '-9' to each side of the equation.
9 + -9 + 4x = 21 + -9

Combine like terms: 9 + -9 = 0
0 + 4x = 21 + -9
4x = 21 + -9

Combine like terms: 21 + -9 = 12
4x = 12

Divide each side by '4'.
x = 3

Simplifying
x = 3

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