Question

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

Answer 1

8

Explanation:

Put the numbers where the variables are and do the arithmetic.

13 -0.75w +8x

= 13 -0.75(12) +8(1/2) . . . . . substitute for w and x

= 13 -9 +4

= 4 +4

= 8