Question

rezolvați ecuatiile
a)2x-8=0
b)5x-10=0
c)4x+8=0
d)7x+21=0​

Answer 1

Explicație pas cu pas:

a)

$2x-8=0 \\ 2x = 8 \\ x = 8 \div 2 = > x = 4$

b)

$5x-10=0 \\ 5x = 10 \\ x = 10 \div 5 = > x = 2$

c)

$4x+8=0 \\ 4x = - 8 \\ x = - 8 \div 4 = > x = - 2$

d)

$7x+21=0 \\ 7x = - 21 \\ x = - 21 \div 7 = > x = - 3$