Question

resolva:

a) x-10=51
b) x-10=51
c) 2x+36=57
d) 2x-100=75
e) 2x+3x=200
f) x+5=2x
g) 3x+17=80
h) x+40=2x
i) 2x-8=x

meee ajudeemmm por favooor!!

Answer 1

$a) \: x - 10 = 51 \\ x = 51 - 10 \\ x = 41$
a letra b está igual a letra a

$c)2x + 36 = 57 \\ 2x = 57 - 36 \\ 2x = 21 \\ x = \frac{21}{2} \\ x = 10.5$
$d)2x - 100 = 75 \\ 2x = 75 - 100 \\ 2x = - 25 \\ x = \frac{ - 25}{2} \\ x = - 12.5$

$e)2x + 3x = 200 \\ 5x = 200 \\ x = \frac{200}{5} \\ x = 40$
$f)x + 5 = 2x \\ x - 2x = - 5 \\ - x = - 5( \times - 1) \\ x = 5$
$g)3x + 17 = 80 \\ 3x = 80 - 17 \\ 3x = 63 \\ x = \frac{63}{3} \\ x = 21$
$h)x + 40 = 2x \\ x - 2x = - 40 \\ - x = - 40( \times - 1) \\ x = 40$
$i)2x - 8 = x \\ 2x - x = 8 \\ x = 8$
Espero ter ajudado ❤️