7x-(3x-9)=45

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Solution for 7x-(3x-9)=45 equation:


Simplifying
7x + -1(3x + -9) = 45

Reorder the terms:
7x + -1(-9 + 3x) = 45
7x + (-9 * -1 + 3x * -1) = 45
7x + (9 + -3x) = 45

Reorder the terms:
9 + 7x + -3x = 45

Combine like terms: 7x + -3x = 4x
9 + 4x = 45

Solving
9 + 4x = 45

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 = 45 + -9

Combine like terms: 9 + -9 = 0
0 + 4x = 45 + -9
4x = 45 + -9

Combine like terms: 45 + -9 = 36
4x = 36

Divide each side by '4'.
x = 9

Simplifying
x = 9

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