7x+5(-4x-9)=20

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Solution for 7x+5(-4x-9)=20 equation:


Simplifying
7x + 5(-4x + -9) = 20

Reorder the terms:
7x + 5(-9 + -4x) = 20
7x + (-9 * 5 + -4x * 5) = 20
7x + (-45 + -20x) = 20

Reorder the terms:
-45 + 7x + -20x = 20

Combine like terms: 7x + -20x = -13x
-45 + -13x = 20

Solving
-45 + -13x = 20

Solving for variable 'x'.

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

Add '45' to each side of the equation.
-45 + 45 + -13x = 20 + 45

Combine like terms: -45 + 45 = 0
0 + -13x = 20 + 45
-13x = 20 + 45

Combine like terms: 20 + 45 = 65
-13x = 65

Divide each side by '-13'.
x = -5

Simplifying
x = -5

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