genyjoannerubiera
04.03.2020 •
Mathematics
Solve with using elimination
3х + 5y = 54
6х +4y = 72
Solved
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Ответ:
y = 6 x=8
Step-by-step explanation:
(3х + 5y = 54)-2 times by -2
6х +4y = 72
-6х + -10y = -108 now combine the equations
6х + 4y = 72
-6y = -36 now divide
y = 6
Plug 6 in 6х +4 * 6 = 72
x=8
Ответ: