А) 96(х-1) - (7х-64) = 38(2-х) + 3(17+2х) + 83
96х - 96 - 7х + 64 = 76 - 38х +51 + 6х + 83
96х - 7х +38х - 6х = 76 + 51 + 83 + 96 - 64
121х = 242
х = 2
б) -(10х-18)+19(4+3х)=9 - 21(х+7)+4(18-3х)
-10х + 18 + 76 + 57х = 9 - 21х - 147 + 72 - 12х
47х + 21х + 12х = 9 - 147 + 72 - 18 - 76
80х = -160
х = -2
в) 18(18-х) - 20(2х+20) - 8 = 19(19-3х) - 25(х+25)
324 - 18х - 40х - 400 - 8 = 361 - 57х - 25х - 625
-18х - 40х + 57х + 25х = 361 - 625 - 324 + 408
24х = -180
х = -7,5