Question

X + 30 = 10 + 50

Answer 1

X + 30 = 10 + 50

X + 30 = 60

X        = 60 - 30

X        = 30

Answer 2

X + 30 = 10 + 50

X + 30 = 60

X        = 60 - 30

X        = 30

Answer 3

X + 30 = 60

<=> x = 60 - 30 

x = 30

Answer 4

50+10=60

60 -30=30

Answer 5

x+30=10+50

x+30=60

x=60-30

x=30