Question

e vamos de tentar ver se alguém responde​

Answer 1

Resposta:

a)

$x+3=7\\x=7-3\\x=4$

b)

$x-8=11\\x=11+8\\x=19$

c)

$x+5-7=15\\x-2=15\\x=15+2\\x=17$

d)

$2x-4=14\\2x=14+4\\2x=18\\x=\dfrac{18}{2}\\x=9$

e)

$3y+2=20\\3y=20-2\\3y=18\\y=\dfrac{18}{3}\\y=6$