nickname0097
27.01.2021 •
Mathematics
A phone costs $50 and goes on sale for 20% off. Select the amount that was discounted as well as the final price after the sale.
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Ответ:
40% because every 10$ = 20%
Step-by-step explanation:
Ответ:
x = 18 / M<C = 114
Step-by-step explanation:
9x - 24 = (2x - 12) + (4x + 42)
9x - 24 = 6x + 30
+24 +24
9x = 6x + 54
-6x -6x
3x = 54
/3 /3
x = 18
C = (4x + 42) = 4(18) + 42 = 72 + 42 = 114