5x+3x=7+15

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Solution for 5x+3x=7+15 equation: 


Simplifying
5x + 3x = 7 + 15

Combine like terms: 5x + 3x = 8x
8x = 7 + 15

Combine like terms: 7 + 15 = 22
8x = 22

Solving
8x = 22

Solving for variable 'x'.

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

Divide each side by '8'.
x = 2.75

Simplifying
x = 2.75

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