Soal
3x + 4y = 14.................(1)
x + 5y = 12................(2)
persamaan (2)
x + 5y = 12
x = 12 - 5y substitusikan ke persamaan (1)
3(12-5y) + 4y = 14
36 - 15y + 4y = 14
36 - 11y = 14
22 = 11y
y = 2 substitusikan ke pers x = 12 - 5y
x = 12 - 10
x = 2
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Soal
3x + 4y = 14.................(1)
x + 5y = 12................(2)
persamaan (2)
x + 5y = 12
x = 12 - 5y substitusikan ke persamaan (1)
3(12-5y) + 4y = 14
36 - 15y + 4y = 14
36 - 11y = 14
22 = 11y
y = 2 substitusikan ke pers x = 12 - 5y
x = 12 - 10
x = 2