Question

1. (х - 4) + (х + 6) = 4
2. (х - 5) - (5 - 3х) = 2
3. 23 - (х + 5) = 13

Answer 1

Ответ:

1. (х-4)+(х+6)=4;

х-4+х+6=4;

2х+2=4;

2х=2;

х=1.

2. (х-5)-(5-3х)=2;

х-5-5+3х=2;

4х-10=2;

4х=12;

х=3.

3. 23-(х+5)=13;

23-х-5=13;

-х+18=13;

-х=13-18;

-х=-5;

х=5.