1)
13(26+x) = 15(26-x)338 + 13x = 390 - 15x28x = 52x = 52/28x = 13/7
Ответ: x = 13/7
2)
6(x+2) = 8(x-2)6x + 12 = 8x - 1622 = 2xx = 22/2x = 11
Ответ: x = 11
1)
13(26+x) = 15(26-x)
338 + 13x = 390 - 15x
28x = 52
x = 52/28
x = 13/7
Ответ: x = 13/7
2)
6(x+2) = 8(x-2)
6x + 12 = 8x - 16
22 = 2x
x = 22/2
x = 11
Ответ: x = 11