Răspuns:
Explicație pas cu pas:
25:5+a×2=25
5 + a x 2 = 25
a x 2 = 25 - 5
a x 2 = 20
a = 20 : 2
a = 10
25 : 5 + 10 x 2 = 5 + 20 = 25
b×4+40:5=16
b x 4 + 8 = 16
b x 4 = 16 - 8
b x 4 = 8
b = 8 : 4
b = 2
2 x 4 + 40 : 5 = 8 + 8 = 16
24-c×3-15:3=10
24 - c x 3 - 5 = 10
24 - c x 3 = 10 + 5
24 - c x3 = 15
c x 3 = 24 - 15
c x 3 = 9
x = 9 : 3
x = 3
24 - 3 x 3 - 15 : 3 = 24 - 9 - 5 = 10
d:4+35:5+4=21
d : 4 + 7 + 4 = 21
d : 4 = 21 - 7 - 4
d : 4 = 10
d = 10 x 4
d = 40
40 : 4 + 35 : 5 + 4 = 10 + 7 + 4 = 21
