Question

2) Resolva as equações:

a) 3x + 5 = 20 b) x + 8 = 12 c) 5x = 30 d) 4x + 2x – 3 = 45 e) 8x – 6x = 26
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Answer 1

a) 3x+5=20

3x=20-5

x=15/3

x=5

b) x+8=12

x=12-8

x=4

c) 5x=30

x=30/5

x=6

d) 4x+2x-3=45

4x+2x=45+3

6x=48

x=48/6

x=8

e) 8x-6x=26

2x=26

x=26/2

x=13