Question

Determine o valor de x:
a) 1/2 x + 2 = 5
b) 2/2x+5 = x + 5

Answer 1

1/2x+2=5
x/2+2=5
x/2=3
x=2.3
x=6
---------------------------
2/2x+5=x+5
2x/2+5=x+5
2x/2=x+5-5
2x/2=x
2x=2x
x=x

Answer 2

$A) \frac{1}{2}x+2=5 \\ \\ \frac{1}{2} x+ \frac{4}{2} = \frac{10}{2} \\ \\ x+4=10 \\ x=6 \\ \\ B) \frac{2}{2}x + 5 =x+ 5 \\ \\ \frac{2}{2}x + \frac{10}{2} = \frac{2x}{2} + \frac{10}{2} \\ \\ 2x+10=2x+10 \\ 2x-2x=5-5$