9 и 4/7
Объяснение:
1.2 * (X – 3) + 0.4 * (1 – X) = 4
1.2X – 3.6 + 0.4 – 0.4X = 4
0.8X – 3.2 = 4
0.8X = 7.2
X = 9
(2 – 3X)/4 + (1 – X)/2 = (4 – 3X)/8
Умножим обе части уравнения на 8:
2 * (2 – 3X) + 4 * (1 – X) = 4 – 3X
4 – 6X + 4 – 4X = 4 – 3X
–10X + 4 = –3X
–7X = –4
7X = 4
X = 4/7
1,2(х-3)+0,4(1-х)=4
1,2х-3,6+0,4-0,4х=4
1,2х-0,4х=4+3,6-0,4
0,8х=7,2; х=9
(2-3х)/4 + (1-х)/2 = (4-3х)/8
2(2-3х) + 4(1-х) = 4-3х
4-6х+4-4х=4-3х
3х-6х-4х=4-4-4
-7х=-4; х=4/7
9 и 4/7
Объяснение:
1.2 * (X – 3) + 0.4 * (1 – X) = 4
1.2X – 3.6 + 0.4 – 0.4X = 4
0.8X – 3.2 = 4
0.8X = 7.2
X = 9
(2 – 3X)/4 + (1 – X)/2 = (4 – 3X)/8
Умножим обе части уравнения на 8:
2 * (2 – 3X) + 4 * (1 – X) = 4 – 3X
4 – 6X + 4 – 4X = 4 – 3X
–10X + 4 = –3X
–7X = –4
7X = 4
X = 4/7
Объяснение:
1,2(х-3)+0,4(1-х)=4
1,2х-3,6+0,4-0,4х=4
1,2х-0,4х=4+3,6-0,4
0,8х=7,2; х=9
(2-3х)/4 + (1-х)/2 = (4-3х)/8
2(2-3х) + 4(1-х) = 4-3х
4-6х+4-4х=4-3х
3х-6х-4х=4-4-4
-7х=-4; х=4/7