(x - 34)*2=136
2х-68=136
2х=204
х=102
x*(8 + 12)=100
8х+12х=100
20х=100
х=5
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(x - 34)*2=136
2х-68=136
2х=204
х=102
x*(8 + 12)=100
8х+12х=100
20х=100
х=5
х - 34 = 68
х = 68 + 34 = 102
Ответ: 102.
x*(8 + 12) = 100
x*20 = 100
x = 100 : 20 = 5