3x-20=-4(x-30)

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Solution for 3x-20=-4(x-30) equation:


Simplifying
3x + -20 = -4(x + -30)

Reorder the terms:
-20 + 3x = -4(x + -30)

Reorder the terms:
-20 + 3x = -4(-30 + x)
-20 + 3x = (-30 * -4 + x * -4)
-20 + 3x = (120 + -4x)

Solving
-20 + 3x = 120 + -4x

Solving for variable 'x'.

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

Add '4x' to each side of the equation.
-20 + 3x + 4x = 120 + -4x + 4x

Combine like terms: 3x + 4x = 7x
-20 + 7x = 120 + -4x + 4x

Combine like terms: -4x + 4x = 0
-20 + 7x = 120 + 0
-20 + 7x = 120

Add '20' to each side of the equation.
-20 + 20 + 7x = 120 + 20

Combine like terms: -20 + 20 = 0
0 + 7x = 120 + 20
7x = 120 + 20

Combine like terms: 120 + 20 = 140
7x = 140

Divide each side by '7'.
x = 20

Simplifying
x = 20

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