а) 42-6x
б) 9y+36
в)40z+32t
19 x-4x=120
15x=120
x=8
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а) 42-6x
б) 9y+36
в)40z+32t
19 x-4x=120
15x=120
x=8
б) 9у +46
в)40z +32t