Question

Resolva as equações: A) x-3= 6+4x B) (7x-8) . 2= 6. (3x-4) C) 16x-6-7x= 15+2x

Answer 1

a) x - 3 = 6 + 4x
x - 4x = 6 + 3 
-3x = 9 *(-1)
3x = -9
x = -9/3
x = -3

b) (7x - 8) * 2 = 6 * (3x - 4)
14x  - 16 = 18x - 24
14x - 18x = -24 + 16
-4x = - 8 *(-1)
4x = 8
x = 8/4
x = 2

c) 16x - 6 - 7x = 15 + 2x
16x - 7x - 2x = 15 + 6 
7x = 21
x = 21/7
x = 3