3х - 24х +21 = 0 * 548 - 21х = - 21 + 0 * 548 -21х = - 21 + 0
-21х = - 21 х = 1
48:4*1=12
64:4*1=16
96:3*1= 32
60:4*1=15
72:2*1=36
108:9*1=12
2+2·5+5·0=12
1) 2·5=10
2) 5·0=0
3) 2+10=12
4) 12+0=12
5(-1,4а+3)-(1-2,5 а)-4(0,8а+3)= -7а+15-1+2,5а-3,2а-12=-7,7а+2
95275 + 2937 * 5 + 374698 = 484658
1) 2937 * 5 = 14685
2) 95275 + 14685 = 109960
3) 109960 + 374698 = 484658
700 * 100 - 28142 : 2= 55929
1) 700 * 100 = 70000
2) 28142 :2 = 14071
3) 70000 - 14071= 55929