Question

a)4x-7=8x-2 b)2x+1=4x-7 c)9x+9+3x=15 alguem me da uma ajuda ai

Answer 1

a) 4x-7=8x-2
4x-8x=-2+7
-4x=5. (-1)
4x=-5
x=-5/4
b) 2x+1=4x-7
2x-4x=-7-1
-2x=-8.(-1)
2x=8
x=8/2
x=4
c) 9x+9+3x=15
9x+3x=15-9
12x=6
x=6/12 (:6)
x=1/2

Answer 2

A) 4x-7=8x-2
4x-8x=7-2
-4x= 5(x-1)
4x= -5
x= -5   ( 1,25 )
     4

B) 2x+1=4x-7
2x-4x= -7-1
-2x= -8(vezes -1)
2x= 8
x= 8=   4
    2

C) 9x+9+3x=15
12x=15-9
12x=6
x= 6  =  3 =   1  = 0,5
    12    6      2