Answer:2a/(3b−c)
substitute a=6 b=4 c=8
(2*6)/((3*4) -8)
12/(12 -8)
12/(4)
3
Choice B
2a+b−3 when a=5 b=2
2(5) +2-3
10+2-3
12-3
9
Choice B
8ab/2bc
rearrange to make the math easier
8/2 * a/c * b/b
4 * a/c *1
4 * 3/4
rearrange to make the math easier
4/4 *3
3
Explanation: