Question

19) Resolva as equações
a) 2x - 4 = 8
b) m +8 = 10
c) 5a + 5 = 20
d)X + 8 + 3X = 24​

Answer 1

a) 2x - 4 = 8

2x = 8+4 ---> 2x = 12

x = 12/2

x = 6

b) m +8 = 10

m = 10-8

m = 2

c) 5a + 5 = 20

5a = 20-5 ---> 5a = 15

a = 15/5

a = 3

d)X + 8 + 3X = 24

4x + 8 = 24

4x = 24 - 8 ---> 4x = 16

x = 16/4

x = 4