Respostas
respondido por:
21
a) 5x-40=2-x
5x+x = 2 + 40 ==> 6x = 42 ==> x = 7
b)20+6x=-2x+28
6x-2x= 28-20 ==> 4x=8 ==> x = 2
c)3,5+1=3+3,1x
4,5 -3 = 3,1x ==> 1,5 = 3,1x ==> x = 1,5 ==> x = 15
3,1 31
d)7p+15-15p-10=-17+31p
31p+15p-7p = 15+17-10
39x = 22
x= 22/39
5x+x = 2 + 40 ==> 6x = 42 ==> x = 7
b)20+6x=-2x+28
6x-2x= 28-20 ==> 4x=8 ==> x = 2
c)3,5+1=3+3,1x
4,5 -3 = 3,1x ==> 1,5 = 3,1x ==> x = 1,5 ==> x = 15
3,1 31
d)7p+15-15p-10=-17+31p
31p+15p-7p = 15+17-10
39x = 22
x= 22/39
respondido por:
16
EQUAÇÃO DO 1° GRAU
a) 5x-40=2-x b) 20+6x= -2x+28 c) 3,5+1=3+3,1x
5x+x=2+40 20-28= -2x-6x 4,5=3+3,1x
6x=42 -8= -8x 4,5-3=3,1x
x=42/6 x= -8/-8 1,5=3,1x
x=7 x=1 x=1,5/3,1
x~0,48
d) 7p+15-15p-10= -17+31p
7p-15p+15-10= -17+31p
-8p+5= -17+31p
5+17=31p+8p
22=39p
p=22/39
p~0,56
a) 5x-40=2-x b) 20+6x= -2x+28 c) 3,5+1=3+3,1x
5x+x=2+40 20-28= -2x-6x 4,5=3+3,1x
6x=42 -8= -8x 4,5-3=3,1x
x=42/6 x= -8/-8 1,5=3,1x
x=7 x=1 x=1,5/3,1
x~0,48
d) 7p+15-15p-10= -17+31p
7p-15p+15-10= -17+31p
-8p+5= -17+31p
5+17=31p+8p
22=39p
p=22/39
p~0,56
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