Question

Rezolvaţi ecuaţiile:
A) 15-7X = 6•(5-x)
B) |x-7|=8
Vă rog​

Answer 1

a. 15 - 7x = 30 -6x

15 - 7x + 6x = 30

-7x + 6x = 30 -15

-x = 30 - 15

- x = 15

x = - 15

b. x - 7 = 8

x - 7 = -8

x = 15 , x = -1

X1 = - 1 , x2 = 15