Question

If t - 9 = 19 then we have to add
to both sides. *​

Answer 1

Answer:

y=9 1/3

PREMISES

y=9 2/3+r=19

ASSUMPTIONS

Let r=the number added to 9 2/3 (addend)

CALCULATIONS

y=9 2/3+r=19

(9 2/3–9 2/3)+r=19–9 2/3

0+r=9 1/3

r=

9 1/3

PROOF

If r=9 1/3, then the equations

9 2/3+9 1/3=19 and

19=19 prove the root (zero) r=9 1/3 of the addition 9 2/3+r=19

C.H.