Question

1.Resolva as equações
a) 4 (x+1)=12

b) 5( 3-x )-4x=18

c) 9x-3(2x+2)=15

d) 6 (3x +2)-8=-2

Answer 1

a) 4 (x+1)=12
4x + 4 =12
4x = 12-4
4x= 8
x= 2

b) 5( 3-x )-4x=18
15+5x-4x=18
x=18-15
x=3

c) 9x-3(2x+2)=15
9x-6x-6=15
3x=15+6
3x=21
x=7

d) 6 (3x +2)-8=-2
18x+12-8=-2
18x=-14+8
18x=-6
x=-0,33333