Question

qual é a resposta 9+2.(5x-4)=21

Answer 1

9+ 2(5x-4) = 21
9+ 10x-8=21
10x= 21-9+8
10x= 20
x=20/10
x=2
Bons estudoss... (;

Answer 2

9 + 2.(5.x - 4) = 21
9 + 10.x - 8 = 21
10.x = 21 - 9 + 8
10.x = 20
x = 20/10
x = 2