Question

Resolva as equações :
a) 3,5x+8=2(x+7). b)6(3x+2)-8=-2



c)-3(x-5)-2(2x+1)=-8

Answer 1

a)3,5x+8=2x+14
3,5x-2x=14-8
1,5x=6
x=6/1,5
x=4

b)18x+12-8+2=0
18x+6=0
18x=6
x=6/18
x=1/3

c)-3x+15-4x-2+8=0
-7x+21=0 ×(-1)
7x-21=0
7x=21
x=3