Question

1. Resolva estas equações: a)2x+5=27

b)4x-8=2x+6

c)7x+1=6x+6

d)5×-3=2x-9

Answer 1

a)2x+5=27
2x= 27-5
2x= 22
x= 22/2
x= 11

b)4x-8=2x+6
4x-2x= 6+8
2x= 14
x= 14/2
x= 7

c)7x+1=6x+6
7x-6x= 6-1
x= 5

d)5×-3=2x-9
5x-2x= -9+3
3x= -6
x= -6/3
x= -2

Answer 2

a) 2x+5=27 .............  2x= 27-5...... x=22/2=11
b)4x-8=2x+6...............4x-2x=8+6......x=14/2= 7
c) 7x+1=6x+6.............7x-6x=6-1...........x=5
d)5x-3=2x-9................... 5x-2x=-9+3.......x= -3/3= -1