nikkiwoodward1ovgszp
09.10.2019 •
Mathematics
What's is 0.05 10 time as much as and how do it comes to be that answer
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Ответ:
Ответ:
x = -2
y = 5
Step-by-step explanation:
7y - 5x = 45 (I)
x = 8 - 2y (II)
Substitute x = 8 - 2y in equation (II)
7y - 5(8-2y) = 45
7y + 8 *(-5) - 2y*(-5) = 45
7y - 40 + 10y = 45
17y - 40 = 45
17y = 45 + 40
17y = 85
y = 85/17
y = 5
Plugin y = 5 in equation (II)
x = 8 - 2*5
x = 8 - 10
x = -2