danielle2814
14.07.2019 •
Mathematics
1. 21 to x and 7 to 10 a 24 b 30 c 40
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Ответ:
Ответ:
x = 27
Step-by-step explanation:
3x -4y = 65
3x -4(4) = 65
3x - 16 = 65
+16 +16
16s cross out and 65 + 16 =81
3x = 81
3x/3 = 81/3
3s cross out
x = 27