lehbug01
10.05.2021 •
Mathematics
5x - 2y = 15
2x + 4y = 12
Select the solution to the system from the options below:
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Ответ:
x = 7/2 and y = 5/4
Step-by-step explanation:
2(5x - 2y = 15)
2x + 4y = 12
10x - 4y = 30
2x + 4y = 12 (add)
-----------------
12x = 42
x =
= 
2x + 4y = 12 (subsitute)
2(
) + 4y = 12
7 + 4y = 12
4y = 5
y =
Ответ: