Evaluate 13-0.75w+8x130.75w+8x13, minus, 0, point, 75, w, plus, 8, x when w=12w=12w, equals, 12 and x=\dfrac12x=21x, equals, start fraction, 1, divided by, 2, end fraction.

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I read this as: Evaluate 13-0.75w+8x when w=12 and x=½.

This comes to 13-0.75×12+8×½=13-9+4=8.

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