Question

Encontre a soluçao das seguintes equaçoes
a)5x=2x+3
b)3(2-2x)=-7x
c)4(2-2x)+7x=5(3+2x)
d)6(x-3)=7(x+1)-16

Answer 1

a) 5x = 2x + 3
5x - 2x = 3
3x = 3
x = 3/3
x = 1

b) 3 (2 - 2x) = - 7x
6 - 6x = -7x
- 6x + 7x = - 6
x = - 6

c) 4 ( 2 - 2x ) + 7x = 5 (3 + 2x)
8 - 8x + 7x = 15 - 8
- 11x = 7 (-1)
11x = -7
x = - 7/11

d) 6 (x - 3) = 7 (x + 1) - 16
6x - 18 = 7x + 7 - 16
6x - 7x = 7 - 16 + 18
-x = 9 (-1)
x = -9