x+[x(.08)+x(.20)]=1280

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Solution for x+[x(.08)+x(.20)]=1280 equation:


Simplifying
x + [x(0.08) + x(0.20)] = 1280

Reorder the terms for easier multiplication:
x + [0.08x + x(0.20)] = 1280

Reorder the terms for easier multiplication:
x + [0.08x + 0.20x] = 1280

Combine like terms: 0.08x + 0.20x = 0.28x
x + [0.28x] = 1280
x + [0.28x] = 1280

Combine like terms: x + [0.28x] = 1.28x
1.28x = 1280

Solving
1.28x = 1280

Solving for variable 'x'.

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

Divide each side by '1.28'.
x = 1000

Simplifying
x = 1000

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