3(4x+5y)=12

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Solution for 3(4x+5y)=12 equation: 


Simplifying
3(4x + 5y) = 12
(4x * 3 + 5y * 3) = 12
(12x + 15y) = 12

Solving
12x + 15y = 12

Solving for variable 'x'.

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

Add '-15y' to each side of the equation.
12x + 15y + -15y = 12 + -15y

Combine like terms: 15y + -15y = 0
12x + 0 = 12 + -15y
12x = 12 + -15y

Divide each side by '12'.
x = 1 + -1.25y

Simplifying
x = 1 + -1.25y

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