Question

ATIVIDADE 1 - Resolva as equações:
a) 5x - 3 = 2x + 9
b) 12- 7+ 4x = 25
b) 4-7x = 2x - 8
d) 5x - 3x = 30​

Answer 1

a) 5x-3=2x+9 b) 12-7+4x=25 c) 4-7x=2x-8

5x-2x=+9+3 4x=25-12+7-4 -7x-2x=-8-4

3x=12 4x=16 9x=12

x=12/3 x=16/4 x=12/9

x=4 x=4 x=4/3

d)5x-3x=30

2x=30

x=30/2

x=15