Question

Ma va rog la mate Efectuati 4X-3X 9X-5X 8X-12X 8X-7-4X+9

Answer 1

4x-3x=(4-3)x=1x=x
9x-5x=(9-5)x=4x
8x-12x=(8-12)x=(-4x)
8x-7-4x+9=4x+2=2(2x+1)

Answer 2

4x - 3x = x
9x - 5x = 4x
8x - 12x = -4x
8x-7-4x+9 = (8x-4x) + (-7+9) = 4x +2