Решите уравнения /x/-8=3 /4x-7/+6=11

Question

Решите уравнения
/x/-8=3 /4x-7/+6=11

Answer 1

| x | - 8 = 3
| x | = 8 +  3
| x | = 11
1) x = - 11;
2) x = 11;

|4x - 7| + 6 = 11
|4x - 7| = 11 - 6 
|4x - 7| = 5
1) 4x - 7 = 5
4x = 12
x = 3;

2) 4x - 7 = - 5
4x = 2
x = 0,5

Comments

спасибо большое