7.9x+2.1x якщо х=1.65
7.9x+2.1x=(7.9+2.1)x=10x при x=1.65 10*1,65=16,5
1.2m+3.9m - 2.1m+1.3 якщо m=0.9
1.2m+3.9m - 2.1m+1.3=(1,2+3,9-2.1)m+1.3=3m+1.3 при m=0.9 3*0.9+1.3= 4
7.9x+2.1x якщо х=1.65
7.9x+2.1x=(7.9+2.1)x=10x при x=1.65 10*1,65=16,5
1.2m+3.9m - 2.1m+1.3 якщо m=0.9
1.2m+3.9m - 2.1m+1.3=(1,2+3,9-2.1)m+1.3=3m+1.3 при m=0.9 3*0.9+1.3= 4