4x-9=3(8)-21

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Solution for 4x-9=3(8)-21 equation:


Simplifying
4x + -9 = 3(8) + -21

Reorder the terms:
-9 + 4x = 3(8) + -21

Multiply 3 * 8
-9 + 4x = 24 + -21

Combine like terms: 24 + -21 = 3
-9 + 4x = 3

Solving
-9 + 4x = 3

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 = 3 + 9

Combine like terms: -9 + 9 = 0
0 + 4x = 3 + 9
4x = 3 + 9

Combine like terms: 3 + 9 = 12
4x = 12

Divide each side by '4'.
x = 3

Simplifying
x = 3

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