1) 1.36х +0.68 +1.52 = 8,32
1.36х = 8,32 - 1.52 - 0.68
1.36х = 6.12
х = 4.5
2) 5.7 +89.2х + 26.51=31.11
89.2х=-1.1
х= -0.01
1.36х+0.68+1.52=8.32
1.36х+1.1=8.32
а дальше сможешь решить
1) 1.36х +0.68 +1.52 = 8,32
1.36х = 8,32 - 1.52 - 0.68
1.36х = 6.12
х = 4.5
2) 5.7 +89.2х + 26.51=31.11
89.2х=-1.1
х= -0.01