How much smaller is 15x – 18y + 19z than 22x – 20y – 13z + 26 ?
The required result is(22x – 20y – 13z + 26) – (15x – 18y + 19z)= 22x – 20y – 13z + 26 – 15x + 18y – 19z= 7x – 2y – 32z + 26