Question

resolva as equações a)5×+20=3×+30 b)2(×+5)+10=3(×+1) c)2×+10+×=2×-20​

Answer 1

Resposta:

a) 5

b) 17

C) -30

Explicação passo-a-passo:

5×+20=3×+30

5x-3x=30-20

2x=10

x=5

2(x+5)+10=3(x+1)

2x+10+10=3x+3

10+10-3=3x-2x

x=17

2x+10+x=2x-20

2x+x-2x=-20-10

x=-30