Пошаговое объяснение:
1) 3(a - b) - 2(a + b)=3а-3b-2a-2b=a-5b
2) 4(x + y) +5(2x -y)=4x+4y+10x-5y=14x-y
3) 2,4(c - 3d) - 1,3(2c -d)=2,4c-7,2d-2,6c+1,3d=-0,2c-5,9d
3 (а +b) - 2 (a +b) =3a +3b - 2a - 2b =a+b 2)4(x +y) +5(2x - y) =4x +4y+10x - 5y =14 x - y 3) 2,4(c - 3d) - 1,3(2c - d) =12/5*(c - 3d) - 13/10*2(c - d) =1/10 *(24(c - 3d) - 13 (2c - d)) =1/10 * (24c - 72d - 26c +13d)=1/10*(-2c - 59d)
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Пошаговое объяснение:
1) 3(a - b) - 2(a + b)=3а-3b-2a-2b=a-5b
2) 4(x + y) +5(2x -y)=4x+4y+10x-5y=14x-y
3) 2,4(c - 3d) - 1,3(2c -d)=2,4c-7,2d-2,6c+1,3d=-0,2c-5,9d
Пошаговое объяснение:
3 (а +b) - 2 (a +b) =3a +3b - 2a - 2b =a+b 2)4(x +y) +5(2x - y) =4x +4y+10x - 5y =14 x - y 3) 2,4(c - 3d) - 1,3(2c - d) =12/5*(c - 3d) - 13/10*2(c - d) =1/10 *(24(c - 3d) - 13 (2c - d)) =1/10 * (24c - 72d - 26c +13d)=1/10*(-2c - 59d)