Question

A) ×+6=10
B) ×-7=-8
c) x + 9 = -20
d) x + 8 = 21
e) 2x = 18
f) 2x = -18
g) 7x = 21

Answer 1

Oie, td bom?

$a) x + 6 = 10\\x = 10 - 6\\x = 4\\\\b) x - 7 = -8\\x = -8 + 7\\x = -1\\\\c) x + 9 = -20\\x = -20 - 9\\x = -29\\\\d)x + 8 = 21\\x = 21 - 8 \\x = 13\\\\e) 2x = 18\\x = \frac{18}{2} = 9\\\\f)2x = -18\\x = \frac{-18}{2} = - 9\\\\g) 7x = 21\\x = \frac{21}{7}\\ x = 3$

Espero ter ajudado...tchau e bons estudos!!

Answer 2

Resposta:

a) 4+6=10

b)15-7=8

c)11+9=20

d)13+8=21

e)2×9=18

f)7×3=21