Question

ajutor dau corona toata pagina

Answer 1

1) 162:[33:(13-68:34)]=54 (A)
   =162:[33:(13-2)]=
   =162:(33:11)=
   =162:3=
   =54
2)
12x[25:(35x25-34x25)+256:64]-60=        35x25-34x25=25x(35-34)=25x1=25
=12x(25:25+4)-60=
=12x5-60=
=60-60=
=0

3)a)
1730:[(21xb-33)-4]x20-16=184
1730:[(21xb-33)-4]x20=184+16
1730:[(21xb-33)-4]x20=200
1730:[(21xb-33)-4]=200:20
1730:[(21xb-33)-4]=10
(21xb-33)-4=1730:10
(21xb-33)-4=173
21xb-33=173+4
21xb-33=177
21xb=177+33
21xb=210
b=210:21
b=10

b)
[10+10x(a-10)]:10-10=10
[10+10x(a-10)]:10=10+10
[10+10x(a-10)]:10=20
[10+10x(a-10)]=20x10
10+10x(a-10)=200
10x(a-10)=200-10
10x(a-10)=190
a-10=190:10
a-10=19
a=19+10
a=29

c)
1200-(2x+100):19+2500=3500
1200-(2x+100):19=3500-2500
1200-(2x+100):19=1000
(2x+100):19=1200-1000
(2x+100):19=200
2x+100=200x19
2x+100=3800
2x=3800-100
2x=3700
x=3700:2
x=1850


4)
5x5+5:5=25+1=26
3+3+3:3=6+1=7