Question

2)х-3=-20
3)10+22,7х=4,7х+28
4)5*(х-3)=20
5)6х+11=2х-5
6)5-(х-2)=4х+17
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Answer 1

х - 3 = -20

х = -20 + 3

х = - 17

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-17 - 3 = -20

-20 = -20

10 + 22,7х = 4,7х + 28

22,7х - 4,7 х = 28 - 10

18х = 18

х = 18 : 18

х = 1

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10 + 22,7 · 1 = 4,7 · 1 + 28

10 + 22,7 = 4,7 + 28

32,7 = 32,7

5 · (х - 3) = 20

5х - 15 = 20

5х = 20 + 15

5х = 35

х = 35 : 5

х = 7

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5 · (7 - 3) = 20

35 - 15 = 20

20 = 20

6х + 11 = 2х - 5

6х - 2х = -5 - 11

4х = -16

х = -16 : 4

х = -4

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6 · (-4) + 11 = 2 · (-4) - 5

-24 + 11 = -8 - 5

-13 = - 13

5 - (х - 2) = 4х + 17

5 - х + 2 = 4х + 17

-х - 4х = 17 - 5 - 2

-5х = 10

х = 10 : (-5)

х = -2

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5 - (-2 - 2) = 4 · (-2) + 17

5 - (-4) = -8 + 17

9 = 9