1. х = 2
2. х = 5,5
3. х = 12
4. х = 4
5. х = 5
6. х = 2
Пошаговое объяснение:
1) 5•(х + 2) = 2•(12 – х)
5х + 10 = 24 - 2х
5х + 2х = 24 - 10
7х = 14
х = 14/7
х = 2
2) 3•(2х – 9) = 4•(х – 4)
6х - 27 = 4х - 16
6х - 4х = 27 - 16
2х = 11
х = 11/2
х = 5,5
3) 4•(х – 9) = 3•(х – 8)
4х - 36 = 3х - 24
4х - 3х = 36 - 24
х = 12
4) 3•(3х + 2) = 7•(х + 2)
9х + 6 = 7х + 14
9х - 7х = 14 - 6
2х = 8
х = 8/2
х = 4
5) 3•(3х – 5) = 2•(4х – 5)
9х - 15 = 8х - 10
9х - 8х = 15 - 10
х = 5
6) 7•(х + 6) = 4•(5х + 4)
7х + 42 = 20х + 16
7х - 20х = 16 - 42
1. х = 2
2. х = 5,5
3. х = 12
4. х = 4
5. х = 5
6. х = 2
Пошаговое объяснение:
1) 5•(х + 2) = 2•(12 – х)
5х + 10 = 24 - 2х
5х + 2х = 24 - 10
7х = 14
х = 14/7
х = 2
2) 3•(2х – 9) = 4•(х – 4)
6х - 27 = 4х - 16
6х - 4х = 27 - 16
2х = 11
х = 11/2
х = 5,5
3) 4•(х – 9) = 3•(х – 8)
4х - 36 = 3х - 24
4х - 3х = 36 - 24
х = 12
4) 3•(3х + 2) = 7•(х + 2)
9х + 6 = 7х + 14
9х - 7х = 14 - 6
2х = 8
х = 8/2
х = 4
5) 3•(3х – 5) = 2•(4х – 5)
9х - 15 = 8х - 10
9х - 8х = 15 - 10
х = 5
6) 7•(х + 6) = 4•(5х + 4)
7х + 42 = 20х + 16
7х - 20х = 16 - 42