7x+9=3x+4y

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Solution for 7x+9=3x+4y equation:


Simplifying
7x + 9 = 3x + 4y

Reorder the terms:
9 + 7x = 3x + 4y

Solving
9 + 7x = 3x + 4y

Solving for variable 'x'.

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

Add '-3x' to each side of the equation.
9 + 7x + -3x = 3x + -3x + 4y

Combine like terms: 7x + -3x = 4x
9 + 4x = 3x + -3x + 4y

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

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

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

Divide each side by '4'.
x = -2.25 + y

Simplifying
x = -2.25 + y

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