Question

1)Resolva a equação 3(2x+4)=4(x+6) e calcule x2
a)6
b)36
c)12
d)18
2)Simplifique a expressão (-2/3).(-3/4).(-5/6).(-6/7)
a)2/7
b)-2/7
c)-2
d)-7
3)Calcule o valor de : 3-1/4 / 1+2/5
a)55
b)1/55
c)55/28
d)1/28

Answer 1

Resposta:

1) a)6

3(2x+4)=4(x+6)

6x+12 = 4x + 24

6x -4x = 24 -12

2x = 12

$x = \frac{12}{2}\\\\x = 6$