Question

aflati termenul necunoscut: a)3/9+4/9+x=1; b)y-5/7=9/7​

Answer 1

a) 7 + 9x = 9 / - 7

9x = 2 / : 9

x = 2 / 9

b) 7y - 5 = 9 / + 5

7y = 14 / : 7

y = 2

Answer 2

Explicație pas cu pas:

a)

7/9 +4/9 +x=1

7+4/9 +x=1

11/9 +x=1

11 +9x/9=1

11+9x=9

9x=9-11

9x=-2

x=-2/9

b) y-5/7=9/7

y=9/7+5/7

y=14/7

y=2