Question

Resolva as equações

a) × + 3 = 7

B) × - 4 = 12

C) 4 × + × + 5 = 15

Answer 1

Resposta:

a) x=7-3=4

b)x=12+4=16

c)5x=15-5=10

5x=10

x=10÷5

x=2

Answer 2

a)x+3= 7

x+3 = 7

x = 7-3

x = 4

b)x-4 = 12

x-4 = 12

x = 12+4

x = 16

c)4x+x+5 = 15

4x+x+5 = 15

5x+5 = 15

5x = 15-5

5x = 10

x = 10÷5

x = 2