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

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


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

Reorder the terms:
-9 = 4x + 7(3 + -1x)
-9 = 4x + (3 * 7 + -1x * 7)
-9 = 4x + (21 + -7x)

Reorder the terms:
-9 = 21 + 4x + -7x

Combine like terms: 4x + -7x = -3x
-9 = 21 + -3x

Solving
-9 = 21 + -3x

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 + 3x = 21 + -3x + 3x

Combine like terms: -3x + 3x = 0
-9 + 3x = 21 + 0
-9 + 3x = 21

Add '9' to each side of the equation.
-9 + 9 + 3x = 21 + 9

Combine like terms: -9 + 9 = 0
0 + 3x = 21 + 9
3x = 21 + 9

Combine like terms: 21 + 9 = 30
3x = 30

Divide each side by '3'.
x = 10

Simplifying
x = 10

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