Question

Calculeaza a×5+3=23
b:7+4=30:3
100-d:8=9×10+4
897+7xe=932
45:c+8×8=73
80-6xf=32

Answer 1

a*5+3 = 23 
a*5=20
a=4

b:7+4=30:3
b:7 = 10-4 
b:7 = 6 
b= 6*7 
b= 42

100-d:8=9*10+4
100-d:8=94
-d:8=-6
d:8=6
d=8*6
d= 48 

897+7*e=932
7*e=35
e=5 

45:c+8*8=73
45:c+64=73
45:c=9
c=5

80-6*f=32
-6*f= 48
-6=48
f=-6

Answer 2

1)

ax5+3=23

5a=23-3

5a=20

a=20:5

a=4

2)

b:7+4=30:3

b:7=10-4

b:7=6

b=7x6

b=42

3)

100-d:8=9x10+4

-d:8=90+4-100

-d:8=-6 (inmultim cu -1)

d:8=6

d=48

4)

897+7xe=932

7e=932-897

7e=35

e=35:7

e=5

5)

45:c+8x8=73

45:c+64=73

45:c=73-64

45:c=9

c=45:9

c=5

6)

80-6xf=32

-6f=32-80 (inmultim cu -1)

6f=80-32

6f=48

f=48:6

f=8