<prompt> Tafuta salio wakati x4 1 inagawanywa kwa x2 - 3x 5.  <response>: Mgawanyiko mrefu umeonyeshwa hapa chini.anzaarrayccc cccmulticolumn2rx2 3x 4 cline2-6x2 - 3x 5 x4 1 safu wima nyingi2rx4 -3x3 5x2 cline2-4safu wima nyingi2r na 3x3 -5x2 safu wima nyingi2r na 3x3 -9x2 15x cline3-5safu wima nyingi2r 4x2 -15x 1 multicolumn2r 4x2 -12x 20 cline4-6multicolumn2r -3x -19 mwishosafuKwa hivyo, salio ni -3x - 19. 