Question

1) Resolva as equações de 1º grau a seguir.

Answer 1

Resposta:

$a)x-3=9\\ x=9+3\\x=12\\\\b)8x-4=12\\8x=12+4\\8x=16\\x=\frac{16}{8} \\x=2\\\\c)9m=27\\m=\frac{27}{9} \\m=3\\\\d)2x+6=20\\2x=20-6\\2x=14\\x=\frac{14}{2} \\x=7\\\\e)6m-3=2m+1\\6m-2m=3+1\\4m=4\\m=\frac{4}{4}\\m=1$

Answer 2

Resposta:

A) x = 12

B) x = 2

C) m = 3

D) x = 17

E) m = 1

Explicação passo-a-passo:

A) x - 3 = 9

x = 9 + 3

x = 12

B) 8x - 4 = 12

8x = 12 + 4

8x = 16

x = 2

C) 9m = 27

9m ÷ 9 = 27 ÷ 9

m = 27 ÷ 9

m = 3

D) 2x + 6 = 20

2x = 20 - 6

2x = 14

x = 17

E) 6m - 3 = 2m + 1

6m - 3 - 2m = 1

6m + 2m = 1 + 3

4m = 1 + 3

4m = 4

m = 1