Question

1)3*x+19*x-4=17
2)25*x+4*x-28*x+7=28
3)23*y-19*y-3*y+9=17
4)41*y-35*y-5*y-8=33

Answer 1

Ответ:

1)3*x+19*x-4=17

3x+18x-4=17

22x-4=17

22x=17+4

22x=21

x=21/22

2)25*x+4*x-28*x+7=28

25x+4x-28x+7=28

x+7=28

x=28-7

x=21

3)23*y-19*y-3*y+9=17

23y-19y-3y+9=17

y+9=17

y=17-9

y=8

4)41*y-35*y-5*y-8=33

41y-35y-5y-8=33

y-8=33

y=33+8

y=41