Question

a.5×x+4-3=-14
b.5×(x+3)=3×(x-5)
c.2×(x+6)-(x+2)=18
La algebra
Ps. Dau coroana

Answer 1

Răspuns:

a ) - 3 ; b ) - 15 ; c ) 8

Explicație pas cu pas:

Bună! ʕ•́ᴥ•̀ʔっ

a ) 5 · x + 4 - 3 = - 14

5x + 1 = - 14

5x = - 14 - 1

5x = - 15

x = ( - 15 ) : 5

x = - 3

b ) 5 · ( x + 3 ) = 3 · ( x - 5 )

5x + 15 = 3x - 15

5x - 3x = - 15 - 15

2x = - 30

x = ( - 30 ) : 2

x = - 15

c ) 2 · ( x + 6 ) - ( x + 2 ) = 18

2x + 12 - x - 2 = 18

x + 10 = 18

x = 18 - 10

x = 8