Question

a-)x+5=8
b-)x+9=-1
c-)2.x=8
d-)3.x=15
e-)3.x-13=8
f-)6.x=2.x+16
g-)2.x-5=x+1
h-)2.x+3=x+4
i-)5.x+7=4.x+10
j-)8.x+9+3.x=15



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Answer 1

Resposta:

a) x = 3

b) x = -10

c) x = 4

d) x = 5

e) x = 7

f) x = 4

g) x = 6

h) x = 1

i) x = 3

j) x = $\frac{6}{11}$ ou x = 0,54

Answer 2

Explicação passo-a-passo:

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

$b)x + 9 = - 1 \\ x = - 1 - 9 \\ x = - 10$

$c)2x = 8\\ x = \frac{8}{2}$

$x = 4$

$d)3x = 15 \\ x = \frac{15}{3}$

$x = 5$

$e)3x - 13 = 8 \\ 3x = 8 + 13 \\ \\ 3x = 21 \\ x = \frac{21}{3}$

$x = 7$

$f)6x = 2x + 16 \\ 6x - 2x = 16 \\ 4x = 16 \\ x = \frac{16}{4}$

$x = 4$

$g)2x - 5 = x + 1 \\ 2x - x = 1 + 5 \\ x = 6$

$h)2x + 3 = x + 4 \\ 2x - x = 4 - 3 \\ x = 1$

$i)5x + 7 = 4x + 10 \\ 5x - 4x = 10 - 7 \\ x = 3$

$j)8x + 9 + 3x = 15 \\ 11x = 15 - 9 \\ 11x = 6 \\ x = \frac{6}{11}$