Ответ:
а)x + x = 152x = 15x = 15 : 2x =7,5б)3x + x = 34x = 3x = 3 : 4x = 0,75в)1,2x + 0,3x = 121,5x = 12x = 12 : 1,5x = 8г)[tex]\frac{1}{6} x + 1\frac{1}{3}x = 2\frac{1}{4}[/tex][tex]\frac{1}{6} x + 1\frac{2}{6}x = 2\frac{1}{4}[/tex][tex]1\frac{1}{2}x = 2\frac{1}{4}[/tex]x = 2,25 : 1,5x = 1,5д)3x - x = 12x = 1x = 1 : 2x = 0,5е)2,4x - 0,2x = 112,2x = 11x = 11 : 2,2x = 5ж)[tex]5\frac{1}{4}x - 2\frac{3}{4} x = 2,5[/tex][tex]2\frac{1}{2} x = 2,5[/tex]x = 2,5 : 2,5x = 1з)[tex]2\frac{1}{2} x - 0,5x = 0,5[/tex]2x = 0,5x = 0,5 : 2x = 0,25и)0,2x + x + 1,5x = 3,42,7x = 3,4x = 3,4 : 2,7[tex]x=3\frac{2}{5} :2\frac{7}{10}[/tex][tex]x=1\frac{7}{27}[/tex]к)12x - x + 3x = 3,514x = 3,5x = 3,5 : 14x = 0,25
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
а)
x + x = 15
2x = 15
x = 15 : 2
x =7,5
б)
3x + x = 3
4x = 3
x = 3 : 4
x = 0,75
в)
1,2x + 0,3x = 12
1,5x = 12
x = 12 : 1,5
x = 8
г)
[tex]\frac{1}{6} x + 1\frac{1}{3}x = 2\frac{1}{4}[/tex]
[tex]\frac{1}{6} x + 1\frac{2}{6}x = 2\frac{1}{4}[/tex]
[tex]1\frac{1}{2}x = 2\frac{1}{4}[/tex]
x = 2,25 : 1,5
x = 1,5
д)
3x - x = 1
2x = 1
x = 1 : 2
x = 0,5
е)
2,4x - 0,2x = 11
2,2x = 11
x = 11 : 2,2
x = 5
ж)
[tex]5\frac{1}{4}x - 2\frac{3}{4} x = 2,5[/tex]
[tex]2\frac{1}{2} x = 2,5[/tex]
x = 2,5 : 2,5
x = 1
з)
[tex]2\frac{1}{2} x - 0,5x = 0,5[/tex]
2x = 0,5
x = 0,5 : 2
x = 0,25
и)
0,2x + x + 1,5x = 3,4
2,7x = 3,4
x = 3,4 : 2,7
[tex]x=3\frac{2}{5} :2\frac{7}{10}[/tex]
[tex]x=1\frac{7}{27}[/tex]
к)
12x - x + 3x = 3,5
14x = 3,5
x = 3,5 : 14
x = 0,25