A) 3x+45=105
3x=105-45
3x=60
x=60/3
x=20
B) 8(x-10)=4x+40
8x-80=4x+40
8x-4x=40+80
4x=120
x=120/4
x=30
E) x+25=85
x=85-25
x=60
60-20=40
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A) 3x+45=105
3x=105-45
3x=60
x=60/3
x=20
B) 8(x-10)=4x+40
8x-80=4x+40
8x-4x=40+80
4x=120
x=120/4
x=30
E) x+25=85
x=85-25
x=60
60-20=40