Question

Qual a raiz da equação? 4 ( x - 5 ) = 10 + 2 ( x + 6 ) *
2 pontos
10
-6
-19
21

Answer 1

4 ( x - 5 )=10 + 2( x + 6 )

4x - 20 = 10 + 2x + 12

4x = 2x + 42

4x - 2x = 42

2x = 42

x = 21

Answer 2

Resposta: 21

4 ( x - 5 ) = 10 + 2 ( x + 6 )

4x-20= 10+2 (x+6)

4x-20= 10+2x+12

4x-20= 22+2x

4x-20= 2x+22

4x-20+20= 2x+22+20

4x= 2x+42

4x-2x= 2x+42-2x

2x= 42

2x/2= 21