Question

resolva as equações b) 4 x - 10 = 2 x + 2 c) 2 x + 1 = 4 x - 7 d) 3 x - 2 = 4 x + 9 e) 5 x + 4 = 3 x - 2 x + 4 f) x + x - 4 = 17 - 2 x + 4 g) 3,4 x - 2,6 = x - 0,92 h) 0,1 x + 3 x + 0,9 x = 14 + 2 x i) 7 ( x - 2 ) = 5 (x + 3) j) 2 (x - 5) + 4 (x - 1) = 0 k) 3 (2 x - 1) = - 2 ( x + 3) l) 7 (x - 1) - 2 (x - 5) = x - 5

Answer 1

b) 4x-10=2x+2
4x-2x=10+2
2x=12
x=12/2
x=6

c)2x+1=4x-7
2x-4x=-1-7
-2x=-8(-1)
2x=8
x=8/2
x=4

Answer 2

b) 4x-10=2x+2
4x2x=10+2
2x=12
x=12/2
x=6 

c)2x+1=4x-7
1+7=4x-2x
8=2x
x=8/2
x=4

d)3x-2=4x+9
3x-4x=9+2
x=11

e)5x+4=3x-2x+4
5x-3x+2x=4-4
4x=0
x=0/4
x=∄

f) x+x-4=17-2x+4
x+x+2x=17+4+4
4x=25
x=25/4

g)3.4x - 2.6 = x - 0.92
3.4x - x = -.0.96 + 2.6
2.4x=1.64
x=1.64/2.4
x=0.7