Ответ:
ВС= x-4
CD= 2,5 * (x-4)
AD= 2,5 * (x-4) +2
x+ (x-4)+ 2,5(x-4) + 2,5(x-4) +2= 26
x+x -4 + 2,5x - 10 + 2,5x -10 + 2= 26
7x -22= 26
7x= 26+ 22
7x= 48
x= 48/7
x= 6 6/7
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Ответ:
ВС= x-4
CD= 2,5 * (x-4)
AD= 2,5 * (x-4) +2
x+ (x-4)+ 2,5(x-4) + 2,5(x-4) +2= 26
x+x -4 + 2,5x - 10 + 2,5x -10 + 2= 26
7x -22= 26
7x= 26+ 22
7x= 48
x= 48/7
x= 6 6/7