Answer:
30
Step-by-step explanation:
Substitute for x and y
2 x 3 x 5 = 6 x 5 = 30
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答案是 NO.c
Step-by step:
第一的,
-3=2x+3
-6=2x
因此,x= -3
第二,
2x+3=5
2x=5-3
2x=2
因此, x=1