` (x - 0)^6 - (x - 2)^8 = 0 `
` <=> x^6 - [(x - 2)^2]^4 = 0 `
` <=> (x^2)^3 - [(x - 2)^2]^4 = 0 `
` <=> (2x - 2)^3 . (0 - 2)^4 = 0 `
` <=> (2x - 2)^3 . (-2)^4 = 0 `
` <=> (2x - 2)^3 . 16 = 0 `
` <=> (2x - 2)^3 = 0 `
` <=> 2x - 2 = 0 `
` <=> 2x = 2 `
` <=> x = 1 `
` 30(x + 2) - 6(x - 5) - 22x = 100 `
` <=> 30x + 60 - 6x + 30 - 22x = 100 `
` <=> 30x - 6x - 22x + 60 + 30 = 100 `
` <=> 2x + 90 = 100 `
` <=> 2x = 10 `
` <=> x = 5 `