4.2x-9=3(1.2x+y)

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Solution for 4.2x-9=3(1.2x+y) equation:


Simplifying
4.2x + -9 = 3(1.2x + y)

Reorder the terms:
-9 + 4.2x = 3(1.2x + y)
-9 + 4.2x = (1.2x * 3 + y * 3)
-9 + 4.2x = (3.6x + 3y)

Solving
-9 + 4.2x = 3.6x + 3y

Solving for variable 'x'.

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

Add '-3.6x' to each side of the equation.
-9 + 4.2x + -3.6x = 3.6x + -3.6x + 3y

Combine like terms: 4.2x + -3.6x = 0.6x
-9 + 0.6x = 3.6x + -3.6x + 3y

Combine like terms: 3.6x + -3.6x = 0.0
-9 + 0.6x = 0.0 + 3y
-9 + 0.6x = 3y

Add '9' to each side of the equation.
-9 + 9 + 0.6x = 9 + 3y

Combine like terms: -9 + 9 = 0
0 + 0.6x = 9 + 3y
0.6x = 9 + 3y

Divide each side by '0.6'.
x = 15 + 5y

Simplifying
x = 15 + 5y

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