7(1-3x)+4(3x-7)=-9

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Solution for 7(1-3x)+4(3x-7)=-9 equation:


Simplifying
7(1 + -3x) + 4(3x + -7) = -9
(1 * 7 + -3x * 7) + 4(3x + -7) = -9
(7 + -21x) + 4(3x + -7) = -9

Reorder the terms:
7 + -21x + 4(-7 + 3x) = -9
7 + -21x + (-7 * 4 + 3x * 4) = -9
7 + -21x + (-28 + 12x) = -9

Reorder the terms:
7 + -28 + -21x + 12x = -9

Combine like terms: 7 + -28 = -21
-21 + -21x + 12x = -9

Combine like terms: -21x + 12x = -9x
-21 + -9x = -9

Solving
-21 + -9x = -9

Solving for variable 'x'.

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

Add '21' to each side of the equation.
-21 + 21 + -9x = -9 + 21

Combine like terms: -21 + 21 = 0
0 + -9x = -9 + 21
-9x = -9 + 21

Combine like terms: -9 + 21 = 12
-9x = 12

Divide each side by '-9'.
x = -1.333333333

Simplifying
x = -1.333333333

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