Answer:
answer is 2.8
Explanation:
3/4=0.75
0.75x12=9
0.75x8=6
9a+6=31.2
subtract 6 from both sides
9a=25.2
divide both sides by 9
a=2.8
2.8
31.2×4/3
12a+8 = 41.6
12a=33.6
a= 2.8
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