Question

Resolva as equacoes do 1° grau:

a) 3x-x=9-7
b)2x+7=15
c) 7x12=3x
d)4y=30-18
e)x+5=7
f)6+x=9

Answer 1

Explicação passo-a-passo:

a) 3x-x=9-7

2x= 2

x= 2/2

x= 1

b)2x+7=15

2x= 15 - 7

2x = 8

x= 8/2

x= 4

c) 7x- 12=3x

7x - 3x= 12

4x= 12

x= 12/4

x= 3

d)4y=30-18

4y= 12

y= 12/4

y= 3

e)x+5=7

x= 7 - 5

x= 2

f)6+x=9

x= 9 - 6

x= 3