1) 19n−6n19n-6n19n−6n:4=26
13n=26*4
13n=104
n=8
2) 16m+5m16m+5m16m+5m:18=7
21m=7*18
21m=126
m=6
3) 17n−8n17n-8n17n−8nx13=351
9n=351:13
9n=27
n=3
1) 19n−6n19n-6n19n−6n:4=26
13n=26*4
13n=104
n=8
2) 16m+5m16m+5m16m+5m:18=7
21m=7*18
21m=126
m=6
3) 17n−8n17n-8n17n−8nx13=351
9n=351:13
9n=27
n=3