Question

equação:2x-14=8
4x-12=20
7x-21=14

Answer 1

$a)2x-14=8 \\ \\ 2x=8+14 \\ \\ 2x=22 \\ \\ x= \frac{22}{2} \\ \\ x=11$

$b)4x-12=20 \\ \\ 4x=20+12 \\ \\ 4x=32 \\ \\ x= \frac{32}{4} \\ \\ x=8 \\ \\ c)7x-21=14 \\ \\ 7x=14+21 \\ \\ 7x=35 \\ \\ x= \frac{35}{7} \\ \\ x=5$

Boa tarde e bons estudos!

Answer 2

Olá,

Vamos lá,

2x-14=8
2x = 8 + 14
2x = 22
x = 22/2
x = 11


4x-12=20
4x = 20 + 12
4x = 32
x = 32/4
x = 8


7x-21=14
7x = 14 + 21
7x = 35
x = 35/7
x = 5