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

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Solution for 7(x-9)-(3x+1)=9 equation:


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

Reorder the terms:
7(-9 + x) + -1(3x + 1) = 9
(-9 * 7 + x * 7) + -1(3x + 1) = 9
(-63 + 7x) + -1(3x + 1) = 9

Reorder the terms:
-63 + 7x + -1(1 + 3x) = 9
-63 + 7x + (1 * -1 + 3x * -1) = 9
-63 + 7x + (-1 + -3x) = 9

Reorder the terms:
-63 + -1 + 7x + -3x = 9

Combine like terms: -63 + -1 = -64
-64 + 7x + -3x = 9

Combine like terms: 7x + -3x = 4x
-64 + 4x = 9

Solving
-64 + 4x = 9

Solving for variable 'x'.

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

Add '64' to each side of the equation.
-64 + 64 + 4x = 9 + 64

Combine like terms: -64 + 64 = 0
0 + 4x = 9 + 64
4x = 9 + 64

Combine like terms: 9 + 64 = 73
4x = 73

Divide each side by '4'.
x = 18.25

Simplifying
x = 18.25

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