Question

Resolva as equações, U=Q , assinale a resposta correta: -x+2(1-x)=5x+2 b) 5(2x+1)-3(x+2)=5x+6 c) 3(2+x)-x=6+x e) 5(4-x)-3x-14=0

Answer 1

a) -x+2+2-2x=5x+2/ -x-2x-5x=+2-2-2+2/ 8x=0/ x=8

b) +5+2+1-3-3x-6=5x+6/ -3x-5x=+6-5-2-1+3/ -8x=+1/ 8÷1=8/ x=8

c) +3+6+3x-x=6+x/ 3x-x-x=6-3-6-3/ +1x=-6/ 6÷1=6/ x=6

e) +5+20-5x-3x-14=0/ -5x-3x=+14-5-20/ -8x=-11/ 11÷8=1,375/ x=1,375