30 №1. 1) 4(x-6)=x-9 2) 6-3(x+1)=7-2 3) (8x++6)=9 - вопрос №76371553011469263172386943582850362 от Kristina122205 26.04.2022 08:52

Question

Математика: 30 №1. 1) 4(x-6)=x-9 2) 6-3(x+1)=7-2 3) (8x++6)=9 4) 3,5-x=8(x+2,8) 5) 0,3(6-2y)=4,5-0,7(y+9) 6) 3/5(7/9x-1/3)=x-2(целых)1/3

Kristina122205 · Answer

1) 4(x-6)=x-94x-24=x-94x-x=-9+243x=15x=15:3x=52) 3) (8x+3)-(10x+6)=98x+3-10x-6=9-2x-3=9-2x=9+3-2x=12x=-12:2x=-64) 3,5-x=8(x+2,8)3,5-x=8x+22,4-x-8x=22,4-3,5-9x=18,9x=-18,9:9x=-2,15) 0,3(6-2y)=4,5-0,7(y+9)1,8-0,6y=4,5-0,7y-6,31,8-0,6y=-1,8-0,7y-0,6y+0,7y=-1,8-1,80,1y=-3,6y=-366) 3/5(7/9x-1/3)=x-2(целых)1/37/15x - 1/5 = x - 2 1/3x - 7/15x = 2 1/3 - 1/58/15x = 2 5/15 - 3/158/15x = 2 2/15x= 32/15 * 15/8x=4...