1. (12m-5m) * 4=252 48m-20m=252 28m=252 m=9 2. (4n+3n)*11=154 44n+33n=154 77n=154 n=2 3. 45:(4m-m)=3 45:3m=3 15m=3 m=0,2 6.( 17n-8n)*13=351 9n*13=351 117n=351 n=3
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1. (12m-5m) * 4=252 48m-20m=252 28m=252 m=9 2. (4n+3n)*11=154 44n+33n=154 77n=154 n=2 3. 45:(4m-m)=3 45:3m=3 15m=3 m=0,2 6.( 17n-8n)*13=351 9n*13=351 117n=351 n=3