7(3a + 12) = 168 ← ( divide both sides by 7 )
3a + 12 = 24 ← ( subtract 12 from both sides )
3a = 12 ← ( divide both sides by 3 )
a = 4
OR
distribute the parenthesis by 7
21a + 84 = 168 ← ( subtract 84 from both sides )
21a = 84 ← ( divide both sides by 21 )
a = 4
1/2 (room 2) + 3/10 (room 4) = 8/10
Simplifying the fraction: 4/5
Answer would be 4/5 of the dishes were cooked by rooms 102 and 104
Hope it helps! Good luck!
Mark me as brainliest pls!
Answer: 0.95
Step-by-step explanation:
19/20 = 0.95
I dont know because there is no figure to look at
500 grams I think it probably will be wrong but worth a try