Question

a)2x=8 b)3x=1d)5x=30c)5x=4x+8 d)2x+5=12 e) 7x-5=2x f) 4x-10=3 g)y+10=6 alguém me ajuda

Answer 1

a)
$2x = 8 \\ x = \frac{8}{2} \\ x = 4$
b)
$3x = 1 \\ x = \frac{1}{3}$
c)
$5x = 30 \\ x = \frac{30}{5} \\ x = 6$
d)
$5x = 4x + 8 \\ 5x - 4x = 8 \\ x = 8$
e)
$2x + 5 = 12 \\ 2x = 12 - 5 \\ x = \frac{7}{2}$
f)
$7x - 5 = 2x \\ 7x - 2x = 5 \\ 5x = 5 \\ x = \frac{5}{5} \\ x= 1$
g)
$4x - 10 = 3 \\ 4x = 10 + 3 \\ x = \frac{13}{4}$
h)
$y + 10 = 6 \\ y = 6 - 10 \\ y = - 4$