Question

75 + k * 20 = 715 сроооочноо

Answer 1

75+к*20=715
к*20=715-75
к*20=640
к=640:20
к=32
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75+32*20=715
715=715

Answer 2

75 + k * 20 = 715
75 + 20k = 715
20k = 715 - 75
20k = 640
k = 640 : 20
k = 32
Ответ: x = 32