To solve the equation \( 4x - 2x + 3 = 20 \), follow these steps:
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Combine like terms on the left side: \[ (4x - 2x) + 3 = 20 \] This simplifies to: \[ 2x + 3 = 20 \]
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Next, isolate \( 2x \) by subtracting 3 from both sides: \[ 2x = 20 - 3 \] This simplifies to: \[ 2x = 17 \]
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Finally, divide both sides by 2 to solve for \( x \): \[ x = \frac{17}{2} \] or: \[ x = 8.5 \]
So the solution is \( x = 8.5 \).