3(x+7)=5(x-4)

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Solution for 3(x+7)=5(x-4) equation:


Simplifying
3(x + 7) = 5(x + -4)

Reorder the terms:
3(7 + x) = 5(x + -4)
(7 * 3 + x * 3) = 5(x + -4)
(21 + 3x) = 5(x + -4)

Reorder the terms:
21 + 3x = 5(-4 + x)
21 + 3x = (-4 * 5 + x * 5)
21 + 3x = (-20 + 5x)

Solving
21 + 3x = -20 + 5x

Solving for variable 'x'.

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

Add '-5x' to each side of the equation.
21 + 3x + -5x = -20 + 5x + -5x

Combine like terms: 3x + -5x = -2x
21 + -2x = -20 + 5x + -5x

Combine like terms: 5x + -5x = 0
21 + -2x = -20 + 0
21 + -2x = -20

Add '-21' to each side of the equation.
21 + -21 + -2x = -20 + -21

Combine like terms: 21 + -21 = 0
0 + -2x = -20 + -21
-2x = -20 + -21

Combine like terms: -20 + -21 = -41
-2x = -41

Divide each side by '-2'.
x = 20.5

Simplifying
x = 20.5

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