Question

Resolva as equações do 1° grau: (Valor: 2,0)

a) x + 10 = 2x – 4

b) 3x + 5 = 12

c) –2x -32 = 3x + 8

d) 7x + 12 = 23x – 20

Answer 1

a)= x+10=2x-4
x-2x= -4-10
-x=-6
x=6

b)=3x+5=12
3x=12-5
3x=7
x= 7/3

c)=-2x-32=3x+8
-2x-3x=8+32
-5x=40
-x=40/5
-x=8

d)=7x+12=23x-20
7x-23x=-20+12
-15x=-8
-x= 8/15