1.-3x=43; 2.-6х=-23; 3.3x-5=13; 4.-2x-9=31; 5.-3x+13=31; - вопрос №91240881343262333513429315313316522345723 от kater7829 21.02.2020 21:10

Question

Математика: 1.-3x=43; 2.-6х=-23; 3.3x-5=13; 4.-2x-9=31; 5.-3x+13=31; 6.5x+22=3x-45; 7.2(x+3)=-3(x-4); 8.(2x-5)(3x+7)=0

kater7829 · Answer

1.-3x=43;x = -43:3x = -14 1/32.-6х=-23;x = 23 : 6x = 3 5/63.3x-5=13;3x = 13 + 53x = 18x = 18:3x = 64.-2x-9=31;-2x = 31 + 9-2x = 40x = -40 : 2x = -205.-3x+13=31;-3x = 31 - 13-3x = 18x = -18:3x = -66.5x+22=3x-45;5x - 3x = -45 - 222x = -67x = -67 : 2x = -33,57.2(x+3)=-3(x-4);2x + 6= -3x + 122x + 3x = 12 - 65x = 6x = 6:5x = 1,28.(2x-5)(3x+7)=02x-5= 0  или  3х+7=02x = 5            3x = -7x = 5:2           x = -7:3x = 2,5 или   х = -2 1/3...