Question

a) x-3= 5
b) x+2= 7
c) x-7= -7
d) x-10= 5
e) 6x-4=2x+8
f) 4x-10=2x+2
g)20x-10=15x
h) 4x= -8x+36
i)4x= -8x +36

Answer 1

Resposta:

$a)x - 3 = 5 \\ x = 5 + 3 \\ x = 8$

$b)x + 2 = 7 \\ x = 7 - 2 \\ x = 5$

$c)x - 7 = - 7 \\ x = - 7 + 7 \\ x = 0$

$d)x - 10 = 5 \\ x = 5 + 10 \\ x = 15$

$e)6x - 4 = 2x + 8 \\ 6x - 2x = 8 + 4 \\ 4x = 12 \\ x = \frac{12}{4} \\ \\ x = 3$

$f)4x - 10 = 2x + 2 \\ 4x - 2x = 2 + 10 \\ 2x = 12 \\ x = \frac{12}{2} \\ \\ x = 6$

$g)20x - 10 = 15x \\ 20x - 15x = 10 \\ 5x = 10 \\ x = \frac{10}{5} \\ x = 2$

$h)4x = - 8x + 36 \\ 4x + 8x = 36 \\ 12x = 36 \\ x = \frac{36}{12} \\ \\ x = 3$

$i)4x = - 8x + 36 \\ 4x + 8x = 36 \\ 12x = 36 \\ x = \frac{36}{12} \\ \\ x = 3$