Question

Agora Resolva as equações:
a) X + 10 = 15
b) X + 7 = 10
c) 8 + x = 11
d) 7 + x= 20
e) x + 10 = 5
f) X + 7 = 1
g) X-6 = 5
h) X - 8 = 10
i) X-7 = 8
j) -7 + x = 7​

Answer 1

Resposta:

a) x = 5

b) x = 3

c) x = 3

d) x = 13

e) x = -5

f) x = -6

g) x = 11

h) x = 18

i) x = 15

j) x = 14

Explicação passo-a-passo:

Para resolver os exercícios basta isolar x, então:

a) x + 10 = 15 → x = 15 - 10 = 5 ∴ x = 5

b) x + 7 = 10 → x = 10 - 7 = 3 ∴ x = 3

c) 8 + x = 11 → x = 11 - 8 = 3 ∴ x = 3

d) 7 + x = 20 → x = 20 - 7 = 13 ∴ x = 13

e) x + 10 = 5 → x = 5 - 10 = -5 ∴ x = -5

f) x + 7 = 1 → x = 1 - 7 = -6 ∴ x = -6

g) x - 6 = 5 → x = 5 + 6 = 11 ∴ x = 11

h) x - 8 = 10 → x = 10 + 8 = 18 ∴ x = 18

i) x - 7 = 8 → x = 8 + 7 = 15 ∴ x = 15

j) -7 + x = 7 → x = 7 + 7 = 14 ∴ x = 14

${\begin{center}\fbox{\rule{3ex}{2ex}\hspace{20ex}{#ESPERO TER AJUDADO !}\hspace{20ex}\rule{3ex}{2ex}}}{\end{center}}$

Answer 2

olá !!!

$a)\\x+10=15\\x=15-10\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=5 \ \checkmark }}}}\\\\b)\\x+7=10\\x=10-7\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=3 \ \checkmark }}}}\\\\c)\\8+x=11\\x=11-8\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=3 \ \checkmark }}}}\\\\d)\\7+x=20\\x=20-7\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=13 \ \checkmark }}}}\\\\e)\\x+10=5\\x=5-10\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=-5 \ \checkmark }}}}\\\\f)\\x+7=1\\x=1-7\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=-6 \ \checkmark }}}}$

$g)\\x-6=5\\x=5+6\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=11 \ \checkmark }}}}\\\\h)\\x-8=10\\x=10+8\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=18 \ \checkmark }}}}\\\\i)\\x-7=8\\x=8+7\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=15 \ \checkmark }}}}\\\\j)\\-7+x=7\\x=7+7\\\huge\boxed{\boxed{\boxed{\boxed{\sf x=14 \ \checkmark }}}}\\\\\huge\boxed{\boxed{\boxed{\boxed{\sf espero \ ter \ ajudado}}}}\\\\\\\huge\boxed{\boxed{\boxed{\boxed{\sf Att: Jovem \ Lendario }}}}$