talahtoo2924
21.04.2020 •
Mathematics
Solve the System by Substitution.
Write solution as an ordered pair. (x,y)
y= x + 1
3x + 7y = 57
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Ответ:
(5, 6)
Step-by-step explanation:
3x + 7y = 57
Substitute y= x+1
3x + 7(x+1) = 57
3x + 7x + 7 = 57
3x + 7x = 57-7
3x + 7x = 50
10x = 50
x = 5
y= x+1= 5+1 = 6
(5, 6)
Ответ: