mrsdeanwinchester18
07.12.2020 •
Mathematics
X + y = 9
X + 3y = 13
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Ответ:
x = 7 and y = 2
X + y = 9 equation1
X + 3y = 13 equation2
- - -
-2y = -4
y = 2
put the y value back in equation 1
x + 2 = 9
x = 9 - 2
x = 7
Ответ:
The bike costs $59.00
We need four of bill denomination which have sum of $59
The answer will be $50 + $5 + $2 + $2