How do you do grade 6 math?

Answer 1

you minus the two sets of # first then find out what "a" is

always the # after the = minus the # before "a"

30 + a = 50

a = 50 - 30

a = 20

30-30=50-30

(50-30=20)

0+a=20

a=20

if a = 20

30+a=50

30+20=50

50=50

therefore a=20