Question

1.Resolva as equações:

Answer 1

a) 5x-7=3x+15 5x-3x=15+7 2x=22 x=22/2 x=11

b)3x-4=2x+10 3x-2x=10+4 1x=14 x=14/1 x=14

c) 2x-3=7(x-4) 2x-3=7x-28 2x-7x=-28+3 -5x=25 x=-25/-5 x=5

d)7(x+10)=8(x+8) 7x+70=8x+64 7x-8x=64-70 -1x=6 x=6/-1 x=-6

e)3(x-2)+5=5 3x-6+5=5 3x=5-5+6 3x=6 x=6/3 x=2

f) 2(x-6)+7x=5-3(x-2) 2x-12+7x=5-3x+6 2x+7x+3x=5+6+12 12x=23 x=23/12