Question

cojunto verdade resolvam 4(x-1)=16 x+3{2x+3+(x+4)}=20 3x+2{x+(x+11).3}=88

Answer 1

4(x-1) = 16

4x - 4 = 16

4x = 16+4

4x = 20

x = 20/4

x = 5

 

x+3{2x+3+(x+4)} = 20

x + 3{2x+3+x+4} = 20

x + 3{3x+7} = 20

x + 9x+21 = 20

10x = 20 - 21

10x = -1

x = -1/10