20x+(-9)=10x+40

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Solution for 20x+(-9)=10x+40 equation:


Simplifying
20x + (-9) = 10x + 40
20x + -9 = 10x + 40

Reorder the terms:
-9 + 20x = 10x + 40

Reorder the terms:
-9 + 20x = 40 + 10x

Solving
-9 + 20x = 40 + 10x

Solving for variable 'x'.

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

Add '-10x' to each side of the equation.
-9 + 20x + -10x = 40 + 10x + -10x

Combine like terms: 20x + -10x = 10x
-9 + 10x = 40 + 10x + -10x

Combine like terms: 10x + -10x = 0
-9 + 10x = 40 + 0
-9 + 10x = 40

Add '9' to each side of the equation.
-9 + 9 + 10x = 40 + 9

Combine like terms: -9 + 9 = 0
0 + 10x = 40 + 9
10x = 40 + 9

Combine like terms: 40 + 9 = 49
10x = 49

Divide each side by '10'.
x = 4.9

Simplifying
x = 4.9

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