7(-3x+9)=-20(x-3)

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Solution for 7(-3x+9)=-20(x-3) equation:


Simplifying
7(-3x + 9) = -20(x + -3)

Reorder the terms:
7(9 + -3x) = -20(x + -3)
(9 * 7 + -3x * 7) = -20(x + -3)
(63 + -21x) = -20(x + -3)

Reorder the terms:
63 + -21x = -20(-3 + x)
63 + -21x = (-3 * -20 + x * -20)
63 + -21x = (60 + -20x)

Solving
63 + -21x = 60 + -20x

Solving for variable 'x'.

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

Add '20x' to each side of the equation.
63 + -21x + 20x = 60 + -20x + 20x

Combine like terms: -21x + 20x = -1x
63 + -1x = 60 + -20x + 20x

Combine like terms: -20x + 20x = 0
63 + -1x = 60 + 0
63 + -1x = 60

Add '-63' to each side of the equation.
63 + -63 + -1x = 60 + -63

Combine like terms: 63 + -63 = 0
0 + -1x = 60 + -63
-1x = 60 + -63

Combine like terms: 60 + -63 = -3
-1x = -3

Divide each side by '-1'.
x = 3

Simplifying
x = 3

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