lclaudettecarte8346
03.12.2021 •
Mathematics
3(c + 6) – 4b = 2b – 16 + 5(a + 1)
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Ответ:
1.5 hours
Step-by-step explanation:
Carlos = x
Maria = y
55x + 47y = 197
x + y = 3.8
x = 3.8 - y
55(3.8 - y) + 47y = 197
209 - 55y + 47y = 197
-8y = -12
y = 3/2 = 1.5