Question

Află termenul necunoscut:(8:8+15:5+25:5):m=3
a:a+3a-2a=5
[36:(24-m)+29]:5=7
(36:3+12):8+7a=24

Answer 1

(8:8+15:5+25:5):m=3
(1+3+5):m=3
9:m=3
m=9:3
m=3

a:a+3a-2a=5
1+3a-2a=5
1+a=5
a=5-1
a=4

[36:(24-m)+29]:5=7
36:(24-m)+29=7×5
36:(24-m)+29=35
36:(24-m)=35-29
36:(24-m)=6
24-m=36:6
24-m=6
m=24-6
m=18

(36:3+12):8+7a=24
(12+12):8+7a=24
24:8+7a=24
3+7a=24
7a=24-3
7a=21
a=21:7
a=3