va rog sa ma ajutati la ex 20​

7/10-a=5/10

a=7/10+5/10

a=12/10

sper ca te.am ajutat asa se fac toate:))

7/10-a=5/10

a=7/10-5/10

a=2/10

2/4+c=4/4

c=4/4-2/4

c=2/4

3/10+6/10-e=2/10

9/10-e=2/10

e=9/10-2/10

e=7/10

9/10-g=7/10-3/10

9/10-g=4/10

g=9/10-4/10

g=5/10

b+3/9=7/9

b=7/9-3/9

b=4/9

f-(56/100+31/100)=61/100

f-87/100=61/100

f=87/100+61/100f=147/100

h+3/4+2/4=10/4-1/4

h+5/4=9/4

h=9/4-5/4

h=4/4

Sper că te-am ajutat !