I'm pretty sure the answer is d • 3 = 48
The liter is dependent and how much u drink is independent
20x + 5y = 1900
x + y = 155....multiply by -20
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20x + 5y = 1900
-20x - 20y = - 3100 (result of multiplying by -20)
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-15y = -1200
y = -1200/-15
y = 80 <== 80 per hr for the mechanic that worked 5 hrs
x + y = 155
x + 80 = 155
x = 155 - 80
x = 75 <== 75 per hr for the mechanic that worked 20 hrs
Answer:
ok real answer 2,-3
Step-by-step explanation:
576
- 252
______
324
Hope this helped:)