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3x + 2y = 15
2y = 8
y = 4
3x + 4y = 23
6x + 4y = 30
-3x. = -7
x = 7/3
3x+4y = 23 _
-2y = -8
y = 4
3x+2.4 = 15
3x+8 = 15
3x = 15-8
3x = 7
x = 7/3
semoga membantu :)