7x-(5x-4)=20

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Solution for 7x-(5x-4)=20 equation:


Simplifying
7x + -1(5x + -4) = 20

Reorder the terms:
7x + -1(-4 + 5x) = 20
7x + (-4 * -1 + 5x * -1) = 20
7x + (4 + -5x) = 20

Reorder the terms:
4 + 7x + -5x = 20

Combine like terms: 7x + -5x = 2x
4 + 2x = 20

Solving
4 + 2x = 20

Solving for variable 'x'.

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

Add '-4' to each side of the equation.
4 + -4 + 2x = 20 + -4

Combine like terms: 4 + -4 = 0
0 + 2x = 20 + -4
2x = 20 + -4

Combine like terms: 20 + -4 = 16
2x = 16

Divide each side by '2'.
x = 8

Simplifying
x = 8

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