Question

V13Rezolvati in Z ecuatiile:
a) 7x - 7=6-3(x + 1);
c) x(x + 1) = x² + 2x + 1;
e) 5(1-2.x) + 1 = 4(x + 3) + 8;​

Answer 1

a. 7x-7= 6-3x-3

7x+3x= 3+7

10x=10

x=1

b. x²+x=x²+2x+1

x²-x²+x-2x=1

-x=1

x= -1

c. 5-10x+1= 4x+12+8

6-10x=4x+20

6-20= 4x+10x

14x= -14

x= -1